15997876780 has 24 divisors (see below), whose sum is σ = 35056217952. Its totient is φ = 6120926592.

The previous prime is 15997876759. The next prime is 15997876831. The reversal of 15997876780 is 8767879951.

15997876780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×15997876780² (a number of 21 digits) contains 22 as substring.

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, 17388537 + ... + 17389456.

It is an arithmetic number, because the mean of its divisors is an integer number (1460675748).

Almost surely, 2^15997876780 is an apocalyptic number.

15997876780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15997876780 is an abundant number, since it is smaller than the sum of its proper divisors (19058341172).

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

15997876780 is a wasteful number, since it uses less digits than its factorization.

15997876780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34778025 (or 34778023 counting only the distinct ones).

The product of its (nonzero) digits is 53343360, while the sum is 67.

The spelling of 15997876780 in words is "fifteen billion, nine hundred ninety-seven million, eight hundred seventy-six thousand, seven hundred eighty".