55568889 has 16 divisors (see below), whose sum is σ = 82477440. Its totient is φ = 36977040.

The previous prime is 55568879. The next prime is 55568893. The reversal of 55568889 is 98886555.

55568889 is a `hidden beast` number, since 5 + 556 + 8 + 8 + 89 = 666.

It is not a de Polignac number, because 55568889 - 2⁷ = 55568761 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (55568839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15879 + ... + 19059.

It is an arithmetic number, because the mean of its divisors is an integer number (5154840).

Almost surely, 2^55568889 is an apocalyptic number.

It is an amenable number.

55568889 is a deficient number, since it is larger than the sum of its proper divisors (26908551).

55568889 is a wasteful number, since it uses less digits than its factorization.

55568889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3831 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 54.

The square root of 55568889 is about 7454.4543059838. The cubic root of 55568889 is about 381.6019377102.

The spelling of 55568889 in words is "fifty-five million, five hundred sixty-eight thousand, eight hundred eighty-nine".