56781694524 has 12 divisors (see below), whose sum is σ = 132490620584. Its totient is φ = 18927231504.

The previous prime is 56781694523. The next prime is 56781694553. The reversal of 56781694524 is 42549618765.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56781694523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2365903927 + ... + 2365903950.

Almost surely, 2^56781694524 is an apocalyptic number.

It is an amenable number.

56781694524 is an abundant number, since it is smaller than the sum of its proper divisors (75708926060).

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

56781694524 is a wasteful number, since it uses less digits than its factorization.

56781694524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4731807884 (or 4731807882 counting only the distinct ones).

The product of its digits is 14515200, while the sum is 57.

The spelling of 56781694524 in words is "fifty-six billion, seven hundred eighty-one million, six hundred ninety-four thousand, five hundred twenty-four".