55875564 has 36 divisors (see below), whose sum is σ = 141529024. Its totient is φ = 18587232.

The previous prime is 55875559. The next prime is 55875569. The reversal of 55875564 is 46557855.

55875564 is a `hidden beast` number, since 5 + 5 + 87 + 5 + 564 = 666.

It is an interprime number because it is at equal distance from previous prime (55875559) and next prime (55875569).

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (55875569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20574 + ... + 23130.

Almost surely, 2^55875564 is an apocalyptic number.

It is an amenable number.

55875564 is an abundant number, since it is smaller than the sum of its proper divisors (85653460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55875564 is a wasteful number, since it uses less digits than its factorization.

55875564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174 (or 3169 counting only the distinct ones).

The product of its digits is 840000, while the sum is 45.

The square root of 55875564 is about 7474.9959197313. The cubic root of 55875564 is about 382.3026484179.

The spelling of 55875564 in words is "fifty-five million, eight hundred seventy-five thousand, five hundred sixty-four".