56602020621 has 4 divisors (see below), whose sum is σ = 75469360832. Its totient is φ = 37734680412.

The previous prime is 56602020589. The next prime is 56602020653. The reversal of 56602020621 is 12602020665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (56602020589) and next prime (56602020653).

It is not a de Polignac number, because 56602020621 - 2⁵ = 56602020589 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 (56602020221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9433670101 + ... + 9433670106.

It is an arithmetic number, because the mean of its divisors is an integer number (18867340208).

Almost surely, 2^56602020621 is an apocalyptic number.

It is an amenable number.

56602020621 is a deficient number, since it is larger than the sum of its proper divisors (18867340211).

56602020621 is a wasteful number, since it uses less digits than its factorization.

56602020621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18867340210.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 56602020621 in words is "fifty-six billion, six hundred two million, twenty thousand, six hundred twenty-one".