56010661157 has 4 divisors (see below), whose sum is σ = 61102539456. Its totient is φ = 50918782860.

The previous prime is 56010661153. The next prime is 56010661171. The reversal of 56010661157 is 75116601065.

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 not a de Polignac number, because 56010661157 - 2² = 56010661153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56010661157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56010661153) 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, 2545939133 + ... + 2545939154.

It is an arithmetic number, because the mean of its divisors is an integer number (15275634864).

Almost surely, 2^56010661157 is an apocalyptic number.

It is an amenable number.

56010661157 is a deficient number, since it is larger than the sum of its proper divisors (5091878299).

56010661157 is a wasteful number, since it uses less digits than its factorization.

56010661157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091878298.

The product of its (nonzero) digits is 37800, while the sum is 38.

The spelling of 56010661157 in words is "fifty-six billion, ten million, six hundred sixty-one thousand, one hundred fifty-seven".