56515500061 has 4 divisors (see below), whose sum is σ = 56946916224. Its totient is φ = 56084083900.

The previous prime is 56515499993. The next prime is 56515500193. The reversal of 56515500061 is 16000551565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56515500061 - 2¹⁹ = 56514975773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56515501061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215707885 + ... + 215708146.

It is an arithmetic number, because the mean of its divisors is an integer number (14236729056).

Almost surely, 2^56515500061 is an apocalyptic number.

It is an amenable number.

56515500061 is a deficient number, since it is larger than the sum of its proper divisors (431416163).

56515500061 is a wasteful number, since it uses less digits than its factorization.

56515500061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431416162.

The product of its (nonzero) digits is 22500, while the sum is 34.

The spelling of 56515500061 in words is "fifty-six billion, five hundred fifteen million, five hundred thousand, sixty-one".