56651632981440 has 224 divisors, whose sum is σ = 216383681349120. Its totient is φ = 12267421249536.

The previous prime is 56651632981403. The next prime is 56651632981441. The reversal of 56651632981440 is 4418923615665.

56651632981440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56651632981441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221722387 + ... + 221977746.

Almost surely, 2^{56651632981440} is an apocalyptic number.

It is an amenable number.

56651632981440 is an abundant number, since it is smaller than the sum of its proper divisors (159732048367680).

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

56651632981440 is a wasteful number, since it uses less digits than its factorization.

56651632981440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443700179 (or 443700169 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 60.

The spelling of 56651632981440 in words is "fifty-six trillion, six hundred fifty-one billion, six hundred thirty-two million, nine hundred eighty-one thousand, four hundred forty".