85170523413 has 32 divisors (see below), whose sum is σ = 126601574400. Its totient is φ = 50614730496.

The previous prime is 85170523393. The next prime is 85170523423. The reversal of 85170523413 is 31432507158.

It is a happy number.

It is not a de Polignac number, because 85170523413 - 2²⁸ = 84902087957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85170523423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4874070 + ... + 4891512.

It is an arithmetic number, because the mean of its divisors is an integer number (3956299200).

Almost surely, 2^85170523413 is an apocalyptic number.

It is an amenable number.

85170523413 is a deficient number, since it is larger than the sum of its proper divisors (41431050987).

85170523413 is a wasteful number, since it uses less digits than its factorization.

85170523413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22521.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 85170523413 in words is "eighty-five billion, one hundred seventy million, five hundred twenty-three thousand, four hundred thirteen".