56056061557 has 4 divisors (see below), whose sum is σ = 56083691020. Its totient is φ = 56028432096.

The previous prime is 56056061539. The next prime is 56056061561. The reversal of 56056061557 is 75516065065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55314806481 + 741255076 = 235191^2 + 27226^2 .

It is a cyclic number.

It is not a de Polignac number, because 56056061557 - 2⁷ = 56056061429 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 (56056061527) 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, 13811688 + ... + 13815745.

It is an arithmetic number, because the mean of its divisors is an integer number (14020922755).

Almost surely, 2^56056061557 is an apocalyptic number.

It is an amenable number.

56056061557 is a deficient number, since it is larger than the sum of its proper divisors (27629463).

56056061557 is a wasteful number, since it uses less digits than its factorization.

56056061557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27629462.

The product of its (nonzero) digits is 945000, while the sum is 46.

The spelling of 56056061557 in words is "fifty-six billion, fifty-six million, sixty-one thousand, five hundred fifty-seven".