15699971976768 has 336 divisors, whose sum is σ = 48291647505920. Its totient is φ = 5052060979200.

The previous prime is 15699971976707. The next prime is 15699971976863. The reversal of 15699971976768 is 86767917999651.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 197143998 + ... + 197223618.

Almost surely, 2^{15699971976768} is an apocalyptic number.

15699971976768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15699971976768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24145823752960).

15699971976768 is an abundant number, since it is smaller than the sum of its proper divisors (32591675529152).

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

15699971976768 is an equidigital number, since it uses as much as digits as its factorization.

15699971976768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80088 (or 80066 counting only the distinct ones).

The product of its digits is 19443654720, while the sum is 90.

The spelling of 15699971976768 in words is "fifteen trillion, six hundred ninety-nine billion, nine hundred seventy-one million, nine hundred seventy-six thousand, seven hundred sixty-eight".