55599905898 has 32 divisors (see below), whose sum is σ = 123755025600. Its totient is φ = 18503350128.

The previous prime is 55599905869. The next prime is 55599905927. The reversal of 55599905898 is 89850999555.

It is an interprime number because it is at equal distance from previous prime (55599905869) and next prime (55599905927).

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, 798261 + ... + 865112.

It is an arithmetic number, because the mean of its divisors is an integer number (3867344550).

Almost surely, 2^55599905898 is an apocalyptic number.

55599905898 is an abundant number, since it is smaller than the sum of its proper divisors (68155119702).

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

55599905898 is a wasteful number, since it uses less digits than its factorization.

55599905898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664003 (or 1663997 counting only the distinct ones).

The product of its (nonzero) digits is 262440000, while the sum is 72.

The spelling of 55599905898 in words is "fifty-five billion, five hundred ninety-nine million, nine hundred five thousand, eight hundred ninety-eight".