56613540494809 has 81 divisors (see below), whose sum is σ = 62052587966397. Its totient is φ = 51646088208000.

The previous prime is 56613540494767. The next prime is 56613540494831. The reversal of 56613540494809 is 90849404531665.

The square root of 56613540494809 is 7524197.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 27339630409 + 56586200864400 = 165347^2 + 7522380^2 .

It is not a de Polignac number, because 56613540494809 - 2⁹ = 56613540494297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56613540294809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 560530103859 + ... + 560530103959.

Almost surely, 2^{56613540494809} is an apocalyptic number.

56613540494809 is the 7524197-th square number.

56613540494809 is the 3762099-th centered octagonal number.

It is an amenable number.

56613540494809 is a deficient number, since it is larger than the sum of its proper divisors (5439047471588).

56613540494809 is an frugal number, since it uses more digits than its factorization.

56613540494809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 111974400, while the sum is 64.

The spelling of 56613540494809 in words is "fifty-six trillion, six hundred thirteen billion, five hundred forty million, four hundred ninety-four thousand, eight hundred nine".