15979797698040 has 768 divisors, whose sum is σ = 58669210828800. Its totient is φ = 3738568780800.

The previous prime is 15979797698023. The next prime is 15979797698063. The reversal of 15979797698040 is 4089679797951.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 8727359925 + ... + 8727361755.

It is an arithmetic number, because the mean of its divisors is an integer number (76392201600).

Almost surely, 2^{15979797698040} is an apocalyptic number.

15979797698040 is a gapful number since it is divisible by the number (10) 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 15979797698040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29334605414400).

15979797698040 is an abundant number, since it is smaller than the sum of its proper divisors (42689413130760).

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

15979797698040 is a wasteful number, since it uses less digits than its factorization.

15979797698040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488 (or 2481 counting only the distinct ones).

The product of its (nonzero) digits is 2160406080, while the sum is 81.

The spelling of 15979797698040 in words is "fifteen trillion, nine hundred seventy-nine billion, seven hundred ninety-seven million, six hundred ninety-eight thousand, forty".