55542645 has 32 divisors (see below), whose sum is σ = 99066240. Its totient is φ = 29525760.

The previous prime is 55542637. The next prime is 55542653. The reversal of 55542645 is 54624555.

55542645 is a `hidden beast` number, since 5 + 5 + 5 + 4 + 2 + 645 = 666.

It is an interprime number because it is at equal distance from previous prime (55542637) and next prime (55542653).

It is not a de Polignac number, because 55542645 - 2³ = 55542637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62605 + ... + 63485.

It is an arithmetic number, because the mean of its divisors is an integer number (3095820).

Almost surely, 2^55542645 is an apocalyptic number.

It is an amenable number.

55542645 is a deficient number, since it is larger than the sum of its proper divisors (43523595).

55542645 is a wasteful number, since it uses less digits than its factorization.

55542645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362 (or 1356 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 55542645 is about 7452.6938082817. The cubic root of 55542645 is about 381.5418541009.

The spelling of 55542645 in words is "fifty-five million, five hundred forty-two thousand, six hundred forty-five".