56565405 has 64 divisors (see below), whose sum is σ = 109509120. Its totient is φ = 27537408.

The previous prime is 56565391. The next prime is 56565433. The reversal of 56565405 is 50456565.

It is a happy number.

56565405 is a `hidden beast` number, since 56 + 565 + 40 + 5 = 666.

It is not a de Polignac number, because 56565405 - 2⁴ = 56565389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56565405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 292989 + ... + 293181.

It is an arithmetic number, because the mean of its divisors is an integer number (1711080).

Almost surely, 2^56565405 is an apocalyptic number.

It is an amenable number.

56565405 is a deficient number, since it is larger than the sum of its proper divisors (52943715).

56565405 is a wasteful number, since it uses less digits than its factorization.

56565405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 381 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 56565405 is about 7520.9976067009. The cubic root of 56565405 is about 383.8695235425.

Adding to 56565405 its sum of digits (36), we get a square (56565441 = 7521²).

The spelling of 56565405 in words is "fifty-six million, five hundred sixty-five thousand, four hundred five".