56561355715 has 8 divisors (see below), whose sum is σ = 67992498288. Its totient is φ = 45169836960.

The previous prime is 56561355709. The next prime is 56561355737. The reversal of 56561355715 is 51755316565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56561355715 - 2⁹ = 56561355203 is a prime.

It is a super-2 number, since 2×56561355715² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9902812 + ... + 9908521.

It is an arithmetic number, because the mean of its divisors is an integer number (8499062286).

Almost surely, 2^56561355715 is an apocalyptic number.

56561355715 is a deficient number, since it is larger than the sum of its proper divisors (11431142573).

56561355715 is a wasteful number, since it uses less digits than its factorization.

56561355715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19811909.

The product of its digits is 2362500, while the sum is 49.

The spelling of 56561355715 in words is "fifty-six billion, five hundred sixty-one million, three hundred fifty-five thousand, seven hundred fifteen".