85642640174 has 32 divisors (see below), whose sum is σ = 158904076800. Its totient is φ = 33710336352.

The previous prime is 85642640063. The next prime is 85642640179. The reversal of 85642640174 is 47104624658.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85642640179) 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, 1146104 + ... + 1218539.

It is an arithmetic number, because the mean of its divisors is an integer number (4965752400).

Almost surely, 2^85642640174 is an apocalyptic number.

85642640174 is a deficient number, since it is larger than the sum of its proper divisors (73261436626).

85642640174 is a wasteful number, since it uses less digits than its factorization.

85642640174 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2364864.

The product of its (nonzero) digits is 1290240, while the sum is 47.

The spelling of 85642640174 in words is "eighty-five billion, six hundred forty-two million, six hundred forty thousand, one hundred seventy-four".