56217257910 has 48 divisors (see below), whose sum is σ = 159452588880. Its totient is φ = 13628425920.

The previous prime is 56217257807. The next prime is 56217257911. The reversal of 56217257910 is 1975271265.

56217257910 is a `hidden beast` number, since 5 + 6 + 2 + 1 + 72 + 579 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 28391565 + ... + 28393544.

It is an arithmetic number, because the mean of its divisors is an integer number (3321928935).

Almost surely, 2^56217257910 is an apocalyptic number.

56217257910 is an abundant number, since it is smaller than the sum of its proper divisors (103235330970).

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

56217257910 is a wasteful number, since it uses less digits than its factorization.

56217257910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56785133 (or 56785130 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 45.

The spelling of 56217257910 in words is "fifty-six billion, two hundred seventeen million, two hundred fifty-seven thousand, nine hundred ten".