56217257912 has 64 divisors (see below), whose sum is σ = 115525418400. Its totient is φ = 25553664000.

The previous prime is 56217257911. The next prime is 56217257927. The reversal of 56217257912 is 21975271265.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56217257911) 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, 306212 + ... + 454092.

Almost surely, 2^56217257912 is an apocalyptic number.

It is an amenable number.

56217257912 is an abundant number, since it is smaller than the sum of its proper divisors (59308160488).

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

56217257912 is a wasteful number, since it uses less digits than its factorization.

56217257912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148008 (or 148004 counting only the distinct ones).

The product of its digits is 529200, while the sum is 47.

The spelling of 56217257912 in words is "fifty-six billion, two hundred seventeen million, two hundred fifty-seven thousand, nine hundred twelve".