56521702170165 has 8 divisors (see below), whose sum is σ = 90434723472288. Its totient is φ = 30144907824080.

The previous prime is 56521702170161. The next prime is 56521702170211. The reversal of 56521702170165 is 56107120712565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 56521702170165 - 2² = 56521702170161 is a prime.

It is a super-2 number, since 2×56521702170165² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56521702170161) 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, 1884056738991 + ... + 1884056739020.

It is an arithmetic number, because the mean of its divisors is an integer number (11304340434036).

Almost surely, 2^{56521702170165} is an apocalyptic number.

It is an amenable number.

56521702170165 is a deficient number, since it is larger than the sum of its proper divisors (33913021302123).

56521702170165 is a wasteful number, since it uses less digits than its factorization.

56521702170165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768113478019.

The product of its (nonzero) digits is 882000, while the sum is 48.

The spelling of 56521702170165 in words is "fifty-six trillion, five hundred twenty-one billion, seven hundred two million, one hundred seventy thousand, one hundred sixty-five".