56561106515 has 4 divisors (see below), whose sum is σ = 67873327824. Its totient is φ = 45248885208.

The previous prime is 56561106509. The next prime is 56561106523. The reversal of 56561106515 is 51560116565.

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 56561106515 - 2⁴ = 56561106499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5656110647 + ... + 5656110656.

It is an arithmetic number, because the mean of its divisors is an integer number (16968331956).

Almost surely, 2^56561106515 is an apocalyptic number.

56561106515 is a deficient number, since it is larger than the sum of its proper divisors (11312221309).

56561106515 is a wasteful number, since it uses less digits than its factorization.

56561106515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11312221308.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 56561106515 in words is "fifty-six billion, five hundred sixty-one million, one hundred six thousand, five hundred fifteen".