55663625 has 16 divisors (see below), whose sum is σ = 70171920. Its totient is φ = 44080000.

The previous prime is 55663591. The next prime is 55663633. The reversal of 55663625 is 52636655.

It can be written as a sum of positive squares in 8 ways, for example, as 16024009 + 39639616 = 4003^2 + 6296^2 .

It is not a de Polignac number, because 55663625 - 2⁶ = 55663561 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 10421 + ... + 14829.

It is an arithmetic number, because the mean of its divisors is an integer number (4385745).

Almost surely, 2^55663625 is an apocalyptic number.

It is an amenable number.

55663625 is a deficient number, since it is larger than the sum of its proper divisors (14508295).

55663625 is a wasteful number, since it uses less digits than its factorization.

55663625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4515 counting only the distinct ones).

The product of its digits is 162000, while the sum is 38.

The square root of 55663625 is about 7460.8059216146. The cubic root of 55663625 is about 381.8186711926.

The spelling of 55663625 in words is "fifty-five million, six hundred sixty-three thousand, six hundred twenty-five".