15999999998 has 8 divisors (see below), whose sum is σ = 24012012000. Its totient is φ = 7995996000.

The previous prime is 15999999991. The next prime is 16000000039. The reversal of 15999999998 is 89999999951.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15999999991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1997003 + ... + 2004998.

It is an arithmetic number, because the mean of its divisors is an integer number (3001501500).

Almost surely, 2^15999999998 is an apocalyptic number.

15999999998 is a deficient number, since it is larger than the sum of its proper divisors (8012012002).

15999999998 is a wasteful number, since it uses less digits than its factorization.

15999999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004002.

The product of its digits is 1721868840, while the sum is 86.

The spelling of 15999999998 in words is "fifteen billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".