85712256784 has 40 divisors (see below), whose sum is σ = 207045194688. Its totient is φ = 33394385280.

The previous prime is 85712256781. The next prime is 85712256823. The reversal of 85712256784 is 48765221758.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (85712256781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34784587 + ... + 34787050.

Almost surely, 2^85712256784 is an apocalyptic number.

It is an amenable number.

85712256784 is an abundant number, since it is smaller than the sum of its proper divisors (121332937904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85712256784 is a wasteful number, since it uses less digits than its factorization.

85712256784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69571663 (or 69571657 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 55.

The spelling of 85712256784 in words is "eighty-five billion, seven hundred twelve million, two hundred fifty-six thousand, seven hundred eighty-four".