56577235321 has 16 divisors (see below), whose sum is σ = 59796239760. Its totient is φ = 53452062720.

The previous prime is 56577235307. The next prime is 56577235369. The reversal of 56577235321 is 12353277565.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 153884025 + 56423351296 = 12405^2 + 237536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56577235321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56577235621) 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, 258561 + ... + 424273.

It is an arithmetic number, because the mean of its divisors is an integer number (3737264985).

Almost surely, 2^56577235321 is an apocalyptic number.

It is an amenable number.

56577235321 is a deficient number, since it is larger than the sum of its proper divisors (3219004439).

56577235321 is a wasteful number, since it uses less digits than its factorization.

56577235321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165996.

The product of its digits is 1323000, while the sum is 46.

The spelling of 56577235321 in words is "fifty-six billion, five hundred seventy-seven million, two hundred thirty-five thousand, three hundred twenty-one".