15999999999998 has 32 divisors (see below), whose sum is σ = 28323276423168. Its totient is φ = 6633621489600.

The previous prime is 15999999999961. The next prime is 16000000000003. The reversal of 15999999999998 is 89999999999951.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15999999999892 and 15999999999901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5211998 + ... + 7691873.

It is an arithmetic number, because the mean of its divisors is an integer number (885102388224).

Almost surely, 2^{15999999999998} is an apocalyptic number.

15999999999998 is a deficient number, since it is larger than the sum of its proper divisors (12323276423170).

15999999999998 is a wasteful number, since it uses less digits than its factorization.

15999999999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12906768.

The product of its digits is 1255242384360, while the sum is 113.

The spelling of 15999999999998 in words is "fifteen trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".