55505618 has 16 divisors (see below), whose sum is σ = 95399424. Its totient is φ = 23726400.

The previous prime is 55505609. The next prime is 55505621. The reversal of 55505618 is 81650555.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671 + ... + 10557.

It is an arithmetic number, because the mean of its divisors is an integer number (5962464).

Almost surely, 2^55505618 is an apocalyptic number.

55505618 is a deficient number, since it is larger than the sum of its proper divisors (39893806).

55505618 is a wasteful number, since it uses less digits than its factorization.

55505618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10297.

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 55505618 is about 7450.2092588061. The cubic root of 55505618 is about 381.4570514495.

The spelling of 55505618 in words is "fifty-five million, five hundred five thousand, six hundred eighteen".