851605452472319 has 16 divisors (see below), whose sum is σ = 870288823901952. Its totient is φ = 833123670915648.

The previous prime is 851605452472277. The next prime is 851605452472361. The reversal of 851605452472319 is 913274254506158.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (851605452472277) and next prime (851605452472361).

It is a cyclic number.

It is not a de Polignac number, because 851605452472319 - 2¹² = 851605452468223 is a prime.

It is a super-2 number, since 2×851605452472319² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851605452472519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131370632 + ... + 137700594.

It is an arithmetic number, because the mean of its divisors is an integer number (54393051493872).

It is a 1-persistent number, because it is pandigital, but 2⋅851605452472319 = 1703210904944638 is not.

Almost surely, 2^{851605452472319} is an apocalyptic number.

851605452472319 is a deficient number, since it is larger than the sum of its proper divisors (18683371429633).

851605452472319 is a wasteful number, since it uses less digits than its factorization.

851605452472319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6345886.

The product of its (nonzero) digits is 72576000, while the sum is 62.

The spelling of 851605452472319 in words is "eight hundred fifty-one trillion, six hundred five billion, four hundred fifty-two million, four hundred seventy-two thousand, three hundred nineteen".