56511056061 has 6 divisors (see below), whose sum is σ = 81627080990. Its totient is φ = 37674037368.

The previous prime is 56511056059. The next prime is 56511056087. The reversal of 56511056061 is 16065011565.

It can be written as a sum of positive squares in only one way, i.e., 56486553561 + 24502500 = 237669^2 + 4950^2 .

It is not a de Polignac number, because 56511056061 - 2¹ = 56511056059 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 (56511056011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3139503106 + ... + 3139503123.

Almost surely, 2^56511056061 is an apocalyptic number.

It is an amenable number.

56511056061 is a deficient number, since it is larger than the sum of its proper divisors (25116024929).

56511056061 is a wasteful number, since it uses less digits than its factorization.

56511056061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6279006235 (or 6279006232 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 56511056061 in words is "fifty-six billion, five hundred eleven million, fifty-six thousand, sixty-one".