55402800618 has 16 divisors (see below), whose sum is σ = 120878837856. Its totient is φ = 16788727440.

The previous prime is 55402800533. The next prime is 55402800643. The reversal of 55402800618 is 81600820455.

It is a super-2 number, since 2×55402800618² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419718121 + ... + 419718252.

It is an arithmetic number, because the mean of its divisors is an integer number (7554927366).

Almost surely, 2^55402800618 is an apocalyptic number.

55402800618 is an abundant number, since it is smaller than the sum of its proper divisors (65476037238).

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

55402800618 is a wasteful number, since it uses less digits than its factorization.

55402800618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 839436389.

The product of its (nonzero) digits is 76800, while the sum is 39.

The spelling of 55402800618 in words is "fifty-five billion, four hundred two million, eight hundred thousand, six hundred eighteen".