56577220451 has 4 divisors (see below), whose sum is σ = 56636965032. Its totient is φ = 56517475872.

The previous prime is 56577220423. The next prime is 56577220517. The reversal of 56577220451 is 15402277565.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56577220451 - 2⁶ = 56577220387 is a prime.

It is a super-2 number, since 2×56577220451² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56577220951) 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, 29870870 + ... + 29872763.

It is an arithmetic number, because the mean of its divisors is an integer number (14159241258).

Almost surely, 2^56577220451 is an apocalyptic number.

56577220451 is a deficient number, since it is larger than the sum of its proper divisors (59744581).

56577220451 is an equidigital number, since it uses as much as digits as its factorization.

56577220451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59744580.

The product of its (nonzero) digits is 588000, while the sum is 44.

The spelling of 56577220451 in words is "fifty-six billion, five hundred seventy-seven million, two hundred twenty thousand, four hundred fifty-one".