15720900416 has 56 divisors (see below), whose sum is σ = 35572125960. Its totient is φ = 6828982272.

The previous prime is 15720900397. The next prime is 15720900427. The reversal of 15720900416 is 61400902751.

It can be written as a sum of positive squares in 4 ways, for example, as 1632160000 + 14088740416 = 40400^2 + 118696^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541601 + ... + 569888.

It is an arithmetic number, because the mean of its divisors is an integer number (635216535).

Almost surely, 2^15720900416 is an apocalyptic number.

15720900416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

15720900416 is an abundant number, since it is smaller than the sum of its proper divisors (19851225544).

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

15720900416 is a wasteful number, since it uses less digits than its factorization.

15720900416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111531 (or 1111521 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 15720900416 in words is "fifteen billion, seven hundred twenty million, nine hundred thousand, four hundred sixteen".