56820488645 has 16 divisors (see below), whose sum is σ = 72201216240. Its totient is φ = 42779065344.

The previous prime is 56820488639. The next prime is 56820488653. The reversal of 56820488645 is 54688402865.

It can be written as a sum of positive squares in 8 ways, for example, as 320624836 + 56499863809 = 17906^2 + 237697^2 .

It is a cyclic number.

It is not a de Polignac number, because 56820488645 - 2⁶ = 56820488581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1680971 + ... + 1714439.

It is an arithmetic number, because the mean of its divisors is an integer number (4512576015).

Almost surely, 2^56820488645 is an apocalyptic number.

It is an amenable number.

56820488645 is a deficient number, since it is larger than the sum of its proper divisors (15380727595).

56820488645 is a wasteful number, since it uses less digits than its factorization.

56820488645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53464.

The product of its (nonzero) digits is 14745600, while the sum is 56.

The spelling of 56820488645 in words is "fifty-six billion, eight hundred twenty million, four hundred eighty-eight thousand, six hundred forty-five".