56165156661 has 8 divisors (see below), whose sum is σ = 76299835680. Its totient is φ = 36736957712.

The previous prime is 56165156599. The next prime is 56165156681. The reversal of 56165156661 is 16665156165.

56165156661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56165156661 - 2¹⁸ = 56164894517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56165156661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56165156681) 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, 176619831 + ... + 176620148.

It is an arithmetic number, because the mean of its divisors is an integer number (9537479460).

Almost surely, 2^56165156661 is an apocalyptic number.

It is an amenable number.

56165156661 is a deficient number, since it is larger than the sum of its proper divisors (20134679019).

56165156661 is a wasteful number, since it uses less digits than its factorization.

56165156661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353240035.

The product of its digits is 972000, while the sum is 48.

The spelling of 56165156661 in words is "fifty-six billion, one hundred sixty-five million, one hundred fifty-six thousand, six hundred sixty-one".