56174077621 has 16 divisors (see below), whose sum is σ = 57784149360. Its totient is φ = 54586920960.

The previous prime is 56174077601. The next prime is 56174077633. The reversal of 56174077621 is 12677047165.

56174077621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1237280625 + 54936796996 = 35175^2 + 234386^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56174077621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56174077601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2330451 + ... + 2354431.

It is an arithmetic number, because the mean of its divisors is an integer number (3611509335).

Almost surely, 2^56174077621 is an apocalyptic number.

It is an amenable number.

56174077621 is a deficient number, since it is larger than the sum of its proper divisors (1610071739).

56174077621 is a wasteful number, since it uses less digits than its factorization.

56174077621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24456.

The product of its (nonzero) digits is 493920, while the sum is 46.

The spelling of 56174077621 in words is "fifty-six billion, one hundred seventy-four million, seventy-seven thousand, six hundred twenty-one".