56821455494656 has 20 divisors (see below), whose sum is σ = 113531931585072. Its totient is φ = 28410727747072.

The previous prime is 56821455494651. The next prime is 56821455494677. The reversal of 56821455494656 is 65649455412865.

56821455494656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56821455494651) 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 as a sum of consecutive naturals, namely, 55489702120 + ... + 55489703143.

Almost surely, 2^{56821455494656} is an apocalyptic number.

It is an amenable number.

56821455494656 is a deficient number, since it is larger than the sum of its proper divisors (56710476090416).

56821455494656 is an equidigital number, since it uses as much as digits as its factorization.

56821455494656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110979405281 (or 110979405265 counting only the distinct ones).

The product of its digits is 1244160000, while the sum is 70.

The spelling of 56821455494656 in words is "fifty-six trillion, eight hundred twenty-one billion, four hundred fifty-five million, four hundred ninety-four thousand, six hundred fifty-six".