IF N=5^5\times10^10\times15^15\times20^20\times25^25\time...

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IF

N=5^5\times10^{10}\times15^{15}\times20^{20}\times25^{25}\times30^{30}\times35^{35}\times40^{40}\times45^{45}\times50^{50}

, then how many zeroes exist between decimal and first non zero digit of N?

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