55564623 has 24 divisors (see below), whose sum is σ = 83655936. Its totient is φ = 36855000.

The previous prime is 55564601. The next prime is 55564627. The reversal of 55564623 is 32646555.

It is a happy number.

55564623 is a `hidden beast` number, since 5 + 5 + 5 + 646 + 2 + 3 = 666.

It is not a de Polignac number, because 55564623 - 2⁵ = 55564591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55564627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60538 + ... + 61448.

It is an arithmetic number, because the mean of its divisors is an integer number (3485664).

Almost surely, 2^55564623 is an apocalyptic number.

55564623 is a deficient number, since it is larger than the sum of its proper divisors (28091313).

55564623 is an equidigital number, since it uses as much as digits as its factorization.

55564623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177 (or 1165 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

The square root of 55564623 is about 7454.1681628469. The cubic root of 55564623 is about 381.5921723207.

The spelling of 55564623 in words is "fifty-five million, five hundred sixty-four thousand, six hundred twenty-three".