56578945 has 16 divisors (see below), whose sum is σ = 68969088. Its totient is φ = 44553600.

The previous prime is 56578943. The next prime is 56578961. The reversal of 56578945 is 54987565.

It is not a de Polignac number, because 56578945 - 2¹ = 56578943 is a prime.

Its product of digits (1512000) is a multiple of the sum of its prime divisors (840).

It is not an unprimeable number, because it can be changed into a prime (56578943) 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, 103162 + ... + 103708.

It is an arithmetic number, because the mean of its divisors is an integer number (4310568).

Almost surely, 2^56578945 is an apocalyptic number.

It is an amenable number.

56578945 is a deficient number, since it is larger than the sum of its proper divisors (12390143).

56578945 is a wasteful number, since it uses less digits than its factorization.

56578945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its digits is 1512000, while the sum is 49.

The square root of 56578945 is about 7521.8976993841. The cubic root of 56578945 is about 383.9001499103.

The spelling of 56578945 in words is "fifty-six million, five hundred seventy-eight thousand, nine hundred forty-five".