55509668 has 24 divisors (see below), whose sum is σ = 98875392. Its totient is φ = 27264384.

The previous prime is 55509647. The next prime is 55509673. The reversal of 55509668 is 86690555.

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 7 ways as a sum of consecutive naturals, for example, 56921 + ... + 57887.

It is an arithmetic number, because the mean of its divisors is an integer number (4119808).

Almost surely, 2^55509668 is an apocalyptic number.

It is an amenable number.

55509668 is a deficient number, since it is larger than the sum of its proper divisors (43365724).

55509668 is a wasteful number, since it uses less digits than its factorization.

55509668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211 (or 1209 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 55509668 is about 7450.4810582942. The cubic root of 55509668 is about 381.4663289697.

The spelling of 55509668 in words is "fifty-five million, five hundred nine thousand, six hundred sixty-eight".