55418559816 has 64 divisors (see below), whose sum is σ = 142879334400. Its totient is φ = 17903950400.

The previous prime is 55418559797. The next prime is 55418559839. The reversal of 55418559816 is 61895581455.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175080 + ... + 376151.

It is an arithmetic number, because the mean of its divisors is an integer number (2232489600).

Almost surely, 2^55418559816 is an apocalyptic number.

It is an amenable number.

55418559816 is an abundant number, since it is smaller than the sum of its proper divisors (87460774584).

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

55418559816 is a wasteful number, since it uses less digits than its factorization.

55418559816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551370 (or 551366 counting only the distinct ones).

The product of its digits is 8640000, while the sum is 57.

The spelling of 55418559816 in words is "fifty-five billion, four hundred eighteen million, five hundred fifty-nine thousand, eight hundred sixteen".