56221772544 has 144 divisors (see below), whose sum is σ = 190008931840. Its totient is φ = 16063349760.

The previous prime is 56221772531. The next prime is 56221772567. The reversal of 56221772544 is 44527712265.

56221772544 is a `hidden beast` number, since 5 + 6 + 22 + 17 + 72 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a self number, because there is not a number n which added to its sum of digits gives 56221772544.

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, 532612 + ... + 629379.

Almost surely, 2^56221772544 is an apocalyptic number.

56221772544 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

56221772544 is an abundant number, since it is smaller than the sum of its proper divisors (133787159296).

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

56221772544 is a wasteful number, since it uses less digits than its factorization.

56221772544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162023 (or 1162003 counting only the distinct ones).

The product of its digits is 940800, while the sum is 45.

The spelling of 56221772544 in words is "fifty-six billion, two hundred twenty-one million, seven hundred seventy-two thousand, five hundred forty-four".