56861134872 has 64 divisors (see below), whose sum is σ = 144779304960. Its totient is φ = 18604790400.

The previous prime is 56861134849. The next prime is 56861134901. The reversal of 56861134872 is 27843116865.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 679273 + ... + 758375.

It is an arithmetic number, because the mean of its divisors is an integer number (2262176640).

Almost surely, 2^56861134872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56861134872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72389652480).

56861134872 is an abundant number, since it is smaller than the sum of its proper divisors (87918170088).

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

56861134872 is a wasteful number, since it uses less digits than its factorization.

56861134872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79664 (or 79660 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The spelling of 56861134872 in words is "fifty-six billion, eight hundred sixty-one million, one hundred thirty-four thousand, eight hundred seventy-two".