56173645 has 12 divisors (see below), whose sum is σ = 74094300. Its totient is φ = 40853120.

The previous prime is 56173639. The next prime is 56173657. The reversal of 56173645 is 54637165.

It can be written as a sum of positive squares in 2 ways, for example, as 18498601 + 37675044 = 4301^2 + 6138^2 .

It is not a de Polignac number, because 56173645 - 2¹⁹ = 55649357 is a prime.

It is a super-3 number, since 3×56173645³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45820 + ... + 47029.

It is an arithmetic number, because the mean of its divisors is an integer number (6174525).

Almost surely, 2^56173645 is an apocalyptic number.

56173645 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

56173645 is a deficient number, since it is larger than the sum of its proper divisors (17920655).

56173645 is a wasteful number, since it uses less digits than its factorization.

56173645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92876 (or 92865 counting only the distinct ones).

The product of its digits is 75600, while the sum is 37.

The square root of 56173645 is about 7494.9079380603. The cubic root of 56173645 is about 382.9812701178.

The spelling of 56173645 in words is "fifty-six million, one hundred seventy-three thousand, six hundred forty-five".