15998591408 has 40 divisors (see below), whose sum is σ = 31283528976. Its totient is φ = 7925760000.

The previous prime is 15998591363. The next prime is 15998591417. The reversal of 15998591408 is 80419589951.

15998591408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 764768 + ... + 785408.

Almost surely, 2^15998591408 is an apocalyptic number.

It is an amenable number.

15998591408 is a deficient number, since it is larger than the sum of its proper divisors (15284937568).

15998591408 is a wasteful number, since it uses less digits than its factorization.

15998591408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21093 (or 21087 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 59.

The spelling of 15998591408 in words is "fifteen billion, nine hundred ninety-eight million, five hundred ninety-one thousand, four hundred eight".