56446132881 has 32 divisors (see below), whose sum is σ = 80599450240. Its totient is φ = 35034177024.

The previous prime is 56446132877. The next prime is 56446132921. The reversal of 56446132881 is 18823164465.

It is not a de Polignac number, because 56446132881 - 2² = 56446132877 is a prime.

It is a super-2 number, since 2×56446132881² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56446132881.

It is not an unprimeable number, because it can be changed into a prime (56446132861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1128111 + ... + 1177083.

It is an arithmetic number, because the mean of its divisors is an integer number (2518732820).

Almost surely, 2^56446132881 is an apocalyptic number.

It is an amenable number.

56446132881 is a deficient number, since it is larger than the sum of its proper divisors (24153317359).

56446132881 is a wasteful number, since it uses less digits than its factorization.

56446132881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49345.

The product of its digits is 1105920, while the sum is 48.

The spelling of 56446132881 in words is "fifty-six billion, four hundred forty-six million, one hundred thirty-two thousand, eight hundred eighty-one".