15690907380625 has 75 divisors (see below), whose sum is σ = 20746879024333. Its totient is φ = 11862293102000.

The previous prime is 15690907380619. The next prime is 15690907380641. The reversal of 15690907380625 is 52608370909651.

The square root of 15690907380625 is 3961175.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 1230167138641 + 14460740241984 = 1109129^2 + 3802728^2 .

It is not a de Polignac number, because 15690907380625 - 2¹⁷ = 15690907249553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 189047076834 + ... + 189047076916.

Almost surely, 2^{15690907380625} is an apocalyptic number.

15690907380625 is the 3961175-th square number.

15690907380625 is the 1980588-th centered octagonal number.

It is an amenable number.

15690907380625 is a deficient number, since it is larger than the sum of its proper divisors (5055971643708).

15690907380625 is an frugal number, since it uses more digits than its factorization.

15690907380625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 15690907380625 in words is "fifteen trillion, six hundred ninety billion, nine hundred seven million, three hundred eighty thousand, six hundred twenty-five".