56403664 has 10 divisors (see below), whose sum is σ = 109282130. Its totient is φ = 28201824.

The previous prime is 56403653. The next prime is 56403667. The reversal of 56403664 is 46630465.

56403664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 56250000 + 153664 = 7500^2 + 392^2 .

It is a super-3 number, since 3×56403664³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56403667) by changing a digit.

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 as a sum of consecutive naturals, namely, 1762599 + ... + 1762630.

It is an arithmetic number, because the mean of its divisors is an integer number (10928213).

Almost surely, 2^56403664 is an apocalyptic number.

It is an amenable number.

56403664 is a deficient number, since it is larger than the sum of its proper divisors (52878466).

56403664 is a wasteful number, since it uses less digits than its factorization.

56403664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525237 (or 3525231 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 56403664 is about 7510.2372798734. The cubic root of 56403664 is about 383.5033002203.

The spelling of 56403664 in words is "fifty-six million, four hundred three thousand, six hundred sixty-four".