56171617165 has 8 divisors (see below), whose sum is σ = 67439174040. Its totient is φ = 44915138112.

The previous prime is 56171617147. The next prime is 56171617169.

56171617165 is nontrivially palindromic in base 10.

56171617165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 25722065161 + 30449552004 = 160381^2 + 174498^2 .

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 56171617165 - 2¹⁷ = 56171486093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56171617169) 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, 2758294 + ... + 2778583.

It is an arithmetic number, because the mean of its divisors is an integer number (8429896755).

Almost surely, 2^56171617165 is an apocalyptic number.

It is an amenable number.

56171617165 is a deficient number, since it is larger than the sum of its proper divisors (11267556875).

56171617165 is a wasteful number, since it uses less digits than its factorization.

56171617165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538911.

The product of its digits is 264600, while the sum is 46.

The spelling of 56171617165 in words is "fifty-six billion, one hundred seventy-one million, six hundred seventeen thousand, one hundred sixty-five".