15974797416912 has 120 divisors (see below), whose sum is σ = 45237557289600. Its totient is φ = 5261842865664.

The previous prime is 15974797416899. The next prime is 15974797416989. The reversal of 15974797416912 is 21961479747951.

It is a happy number.

15974797416912 is a `hidden beast` number, since 1 + 5 + 97 + 479 + 7 + 4 + 1 + 69 + 1 + 2 = 666.

It is a super-3 number, since 3×15974797416912³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 23 ways as a sum of consecutive naturals, for example, 20364153 + ... + 21134055.

It is an arithmetic number, because the mean of its divisors is an integer number (376979644080).

Almost surely, 2^{15974797416912} is an apocalyptic number.

15974797416912 is a gapful number since it is divisible by the number (12) 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 15974797416912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22618778644800).

15974797416912 is an abundant number, since it is smaller than the sum of its proper divisors (29262759872688).

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

15974797416912 is a wasteful number, since it uses less digits than its factorization.

15974797416912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771625 (or 771616 counting only the distinct ones).

The product of its digits is 240045120, while the sum is 72.

The spelling of 15974797416912 in words is "fifteen trillion, nine hundred seventy-four billion, seven hundred ninety-seven million, four hundred sixteen thousand, nine hundred twelve".