56145665 has 16 divisors (see below), whose sum is σ = 71987520. Its totient is φ = 41912640.

The previous prime is 56145647. The next prime is 56145667. The reversal of 56145665 is 56654165.

It is not a de Polignac number, because 56145665 - 2¹⁸ = 55883521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56145667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1955 + ... + 10775.

It is an arithmetic number, because the mean of its divisors is an integer number (4499220).

Almost surely, 2^56145665 is an apocalyptic number.

It is an amenable number.

56145665 is a deficient number, since it is larger than the sum of its proper divisors (15841855).

56145665 is a wasteful number, since it uses less digits than its factorization.

56145665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8912.

The product of its digits is 108000, while the sum is 38.

The square root of 56145665 is about 7493.0411049186. The cubic root of 56145665 is about 382.9176721108.

The spelling of 56145665 in words is "fifty-six million, one hundred forty-five thousand, six hundred sixty-five".