56639925 has 24 divisors (see below), whose sum is σ = 104050880. Its totient is φ = 30207600.

The previous prime is 56639923. The next prime is 56639951. The reversal of 56639925 is 52993665.

56639925 is a `hidden beast` number, since 5 + 6 + 639 + 9 + 2 + 5 = 666.

It is not a de Polignac number, because 56639925 - 2¹ = 56639923 is a prime.

It is a super-2 number, since 2×56639925² = 6416162208011250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56639923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41281 + ... + 42630.

Almost surely, 2^56639925 is an apocalyptic number.

It is an amenable number.

56639925 is a deficient number, since it is larger than the sum of its proper divisors (47410955).

56639925 is a wasteful number, since it uses less digits than its factorization.

56639925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83930 (or 83919 counting only the distinct ones).

The product of its digits is 437400, while the sum is 45.

The square root of 56639925 is about 7525.9501061328. The cubic root of 56639925 is about 384.0380211376.

The spelling of 56639925 in words is "fifty-six million, six hundred thirty-nine thousand, nine hundred twenty-five".