56055005561 has 8 divisors (see below), whose sum is σ = 56191922400. Its totient is φ = 55918251360.

The previous prime is 56055005551. The next prime is 56055005563. The reversal of 56055005561 is 16550055065.

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

It is a cyclic number.

It is not a de Polignac number, because 56055005561 - 2¹⁸ = 56054743417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56055005563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 664325 + ... + 743933.

It is an arithmetic number, because the mean of its divisors is an integer number (7023990300).

Almost surely, 2^56055005561 is an apocalyptic number.

It is an amenable number.

56055005561 is a deficient number, since it is larger than the sum of its proper divisors (136916839).

56055005561 is a wasteful number, since it uses less digits than its factorization.

56055005561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81319.

The product of its (nonzero) digits is 112500, while the sum is 38.

The spelling of 56055005561 in words is "fifty-six billion, fifty-five million, five thousand, five hundred sixty-one".