15996651503616 has 1020 divisors, whose sum is σ = 56300913666360. Its totient is φ = 4512578273280.

The previous prime is 15996651503603. The next prime is 15996651503639. The reversal of 15996651503616 is 61630515669951.

15996651503616 is a `hidden beast` number, since 1 + 5 + 9 + 9 + 6 + 6 + 5 + 1 + 5 + 0 + 3 + 616 = 666.

It is a super-2 number, since 2×15996651503616² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 23150001831 + ... + 23150002521.

Almost surely, 2^{15996651503616} is an apocalyptic number.

15996651503616 is a gapful number since it is divisible by the number (16) 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 15996651503616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28150456833180).

15996651503616 is an abundant number, since it is smaller than the sum of its proper divisors (40304262162744).

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

15996651503616 is an frugal number, since it uses more digits than its factorization.

15996651503616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838 (or 792 counting only the distinct ones).

The product of its (nonzero) digits is 39366000, while the sum is 63.

The spelling of 15996651503616 in words is "fifteen trillion, nine hundred ninety-six billion, six hundred fifty-one million, five hundred three thousand, six hundred sixteen".