15997489488 has 60 divisors (see below), whose sum is σ = 46214982528. Its totient is φ = 5160479040.

The previous prime is 15997489411. The next prime is 15997489517. The reversal of 15997489488 is 88498479951.

15997489488 is a `hidden beast` number, since 1 + 59 + 97 + 4 + 8 + 9 + 488 = 666.

It is a super-5 number, since 5×15997489488⁵ (a number of 52 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

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, 1787370 + ... + 1796297.

Almost surely, 2^15997489488 is an apocalyptic number.

15997489488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15997489488 is an abundant number, since it is smaller than the sum of its proper divisors (30217493040).

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

15997489488 is a wasteful number, since it uses less digits than its factorization.

15997489488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583712 (or 3583703 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 72.

The spelling of 15997489488 in words is "fifteen billion, nine hundred ninety-seven million, four hundred eighty-nine thousand, four hundred eighty-eight".