56156610161 has 4 divisors (see below), whose sum is σ = 56197691712. Its totient is φ = 56115528612.

The previous prime is 56156610131. The next prime is 56156610229. The reversal of 56156610161 is 16101665165.

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 a de Polignac number, because none of the positive numbers 2^k-56156610161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56156610101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20538725 + ... + 20541458.

It is an arithmetic number, because the mean of its divisors is an integer number (14049422928).

Almost surely, 2^56156610161 is an apocalyptic number.

It is an amenable number.

56156610161 is a deficient number, since it is larger than the sum of its proper divisors (41081551).

56156610161 is a wasteful number, since it uses less digits than its factorization.

56156610161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41081550.

The product of its (nonzero) digits is 32400, while the sum is 38.

The spelling of 56156610161 in words is "fifty-six billion, one hundred fifty-six million, six hundred ten thousand, one hundred sixty-one".