56253501621 has 8 divisors (see below), whose sum is σ = 83338520960. Its totient is φ = 37502334396.

The previous prime is 56253501613. The next prime is 56253501671. The reversal of 56253501621 is 12610535265.

56253501621 is a `hidden beast` number, since 5 + 6 + 25 + 3 + 5 + 0 + 1 + 621 = 666.

It is not a de Polignac number, because 56253501621 - 2³ = 56253501613 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 (56253501671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041731485 + ... + 1041731538.

It is an arithmetic number, because the mean of its divisors is an integer number (10417315120).

Almost surely, 2^56253501621 is an apocalyptic number.

It is an amenable number.

56253501621 is a deficient number, since it is larger than the sum of its proper divisors (27085019339).

56253501621 is a wasteful number, since it uses less digits than its factorization.

56253501621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083463032 (or 2083463026 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 56253501621 in words is "fifty-six billion, two hundred fifty-three million, five hundred one thousand, six hundred twenty-one".