15998899904 has 28 divisors (see below), whose sum is σ = 34189958544. Its totient is φ = 7384107264.

The previous prime is 15998899871. The next prime is 15998899909. The reversal of 15998899904 is 40999889951.

It is a super-2 number, since 2×15998899904² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (15998899909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9613892 + ... + 9615555.

It is an arithmetic number, because the mean of its divisors is an integer number (1221069948).

Almost surely, 2^15998899904 is an apocalyptic number.

It is an amenable number.

15998899904 is an abundant number, since it is smaller than the sum of its proper divisors (18191058640).

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

15998899904 is a wasteful number, since it uses less digits than its factorization.

15998899904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19229472 (or 19229462 counting only the distinct ones).

The product of its (nonzero) digits is 75582720, while the sum is 71.

The spelling of 15998899904 in words is "fifteen billion, nine hundred ninety-eight million, eight hundred ninety-nine thousand, nine hundred four".