55378618 has 16 divisors (see below), whose sum is σ = 88796736. Its totient is φ = 25838560.

The previous prime is 55378607. The next prime is 55378621. The reversal of 55378618 is 81687355.

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, 12796 + ... + 16567.

It is an arithmetic number, because the mean of its divisors is an integer number (5549796).

Almost surely, 2^55378618 is an apocalyptic number.

55378618 is a deficient number, since it is larger than the sum of its proper divisors (33418118).

55378618 is a wasteful number, since it uses less digits than its factorization.

55378618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29429.

The product of its digits is 201600, while the sum is 43.

The square root of 55378618 is about 7441.6811272723. The cubic root of 55378618 is about 381.1658974927.

The spelling of 55378618 in words is "fifty-five million, three hundred seventy-eight thousand, six hundred eighteen".