56165601 has 4 divisors (see below), whose sum is σ = 74887472. Its totient is φ = 37443732.

The previous prime is 56165587. The next prime is 56165621. The reversal of 56165601 is 10656165.

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 56165601 - 2⁶ = 56165537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56165621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9360931 + ... + 9360936.

It is an arithmetic number, because the mean of its divisors is an integer number (18721868).

Almost surely, 2^56165601 is an apocalyptic number.

It is an amenable number.

56165601 is a deficient number, since it is larger than the sum of its proper divisors (18721871).

56165601 is a wasteful number, since it uses less digits than its factorization.

56165601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18721870.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 56165601 is about 7494.3712878400. The cubic root of 56165601 is about 382.9629884224.

The spelling of 56165601 in words is "fifty-six million, one hundred sixty-five thousand, six hundred one".