15980389905720 has 64 divisors (see below), whose sum is σ = 47941482546720. Its totient is φ = 4261409501184.

The previous prime is 15980389905713. The next prime is 15980389905721. The reversal of 15980389905720 is 2750998308951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15980389905721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23505612 + ... + 24175908.

Almost surely, 2^{15980389905720} is an apocalyptic number.

15980389905720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15980389905720 is an abundant number, since it is smaller than the sum of its proper divisors (31961092641000).

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

15980389905720 is a wasteful number, since it uses less digits than its factorization.

15980389905720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868984 (or 868980 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 66.

The spelling of 15980389905720 in words is "fifteen trillion, nine hundred eighty billion, three hundred eighty-nine million, nine hundred five thousand, seven hundred twenty".