16800558120 has 48 divisors (see below), whose sum is σ = 54601815060. Its totient is φ = 4480148736.

The previous prime is 16800558029. The next prime is 16800558163. The reversal of 16800558120 is 2185500861.

16800558120 is a `hidden beast` number, since 1 + 6 + 80 + 0 + 558 + 1 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13972658436 + 2827899684 = 118206^2 + 53178^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23333749 + ... + 23334468.

Almost surely, 2^16800558120 is an apocalyptic number.

16800558120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16800558120 is an abundant number, since it is smaller than the sum of its proper divisors (37801256940).

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

16800558120 is a wasteful number, since it uses less digits than its factorization.

16800558120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46668234 (or 46668227 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The spelling of 16800558120 in words is "sixteen billion, eight hundred million, five hundred fifty-eight thousand, one hundred twenty".