56640975 has 12 divisors (see below), whose sum is σ = 93646536. Its totient is φ = 30208480.

The previous prime is 56640953. The next prime is 56640977. The reversal of 56640975 is 57904665.

56640975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56640975 - 2¹⁰ = 56639951 is a prime.

It is a super-3 number, since 3×56640975³ (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 (56640977) 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 in 11 ways as a sum of consecutive naturals, for example, 377532 + ... + 377681.

It is an arithmetic number, because the mean of its divisors is an integer number (7803878).

Almost surely, 2^56640975 is an apocalyptic number.

56640975 is a deficient number, since it is larger than the sum of its proper divisors (37005561).

56640975 is a wasteful number, since it uses less digits than its factorization.

56640975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755226 (or 755221 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 56640975 is about 7526.0198644436. The cubic root of 56640975 is about 384.0403942424.

The spelling of 56640975 in words is "fifty-six million, six hundred forty thousand, nine hundred seventy-five".