56640415 has 16 divisors (see below), whose sum is σ = 73735200. Its totient is φ = 41519232.

The previous prime is 56640407. The next prime is 56640427. The reversal of 56640415 is 51404665.

56640415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 56640415 - 2³ = 56640407 is a prime.

It is a super-2 number, since 2×56640415² = 6416273222744450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5901 + ... + 12169.

It is an arithmetic number, because the mean of its divisors is an integer number (4608450).

Almost surely, 2^56640415 is an apocalyptic number.

56640415 is a deficient number, since it is larger than the sum of its proper divisors (17094785).

56640415 is a wasteful number, since it uses less digits than its factorization.

56640415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 56640415 is about 7525.9826600916. The cubic root of 56640415 is about 384.0391285902.

The spelling of 56640415 in words is "fifty-six million, six hundred forty thousand, four hundred fifteen".