56657745 has 16 divisors (see below), whose sum is σ = 100725120. Its totient is φ = 30217392.

The previous prime is 56657743. The next prime is 56657761. The reversal of 56657745 is 54775665.

It is not a de Polignac number, because 56657745 - 2¹ = 56657743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 56657745.

It is not an unprimeable number, because it can be changed into a prime (56657743) 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 15 ways as a sum of consecutive naturals, for example, 209709 + ... + 209978.

It is an arithmetic number, because the mean of its divisors is an integer number (6295320).

Almost surely, 2^56657745 is an apocalyptic number.

It is an amenable number.

56657745 is a deficient number, since it is larger than the sum of its proper divisors (44067375).

56657745 is a wasteful number, since it uses less digits than its factorization.

56657745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419701 (or 419695 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 56657745 is about 7527.1339167043. The cubic root of 56657745 is about 384.0782921417.

It can be divided in two parts, 566 and 57745, that added together give a triangular number (58311 = T₃₄₁).

The spelling of 56657745 in words is "fifty-six million, six hundred fifty-seven thousand, seven hundred forty-five".