15968783125 has 20 divisors (see below), whose sum is σ = 19970316828. Its totient is φ = 12764960000.

The previous prime is 15968783093. The next prime is 15968783143. The reversal of 15968783125 is 52138786951.

It can be written as a sum of positive squares in 10 ways, for example, as 9350309809 + 6618473316 = 96697^2 + 81354^2 .

It is not a de Polignac number, because 15968783125 - 2⁵ = 15968783093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 841239 + ... + 860011.

Almost surely, 2^15968783125 is an apocalyptic number.

It is an amenable number.

15968783125 is a deficient number, since it is larger than the sum of its proper divisors (4001533703).

15968783125 is an equidigital number, since it uses as much as digits as its factorization.

15968783125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20154 (or 20139 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 55.

The spelling of 15968783125 in words is "fifteen billion, nine hundred sixty-eight million, seven hundred eighty-three thousand, one hundred twenty-five".