15965586025 has 27 divisors (see below), whose sum is σ = 20376684741. Its totient is φ = 12409071840.

The previous prime is 15965586001. The next prime is 15965586031. The reversal of 15965586025 is 52068556951.

The square root of 15965586025 is 126355.

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

It can be written as a sum of positive squares in 4 ways, for example, as 1515622761 + 14449963264 = 38931^2 + 120208^2 .

It is not a de Polignac number, because 15965586025 - 2¹³ = 15965577833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 23375334 + ... + 23376016.

Almost surely, 2^15965586025 is an apocalyptic number.

15965586025 is the 126355-th square number.

15965586025 is the 63178-th centered octagonal number.

It is an amenable number.

15965586025 is a deficient number, since it is larger than the sum of its proper divisors (4411098716).

15965586025 is an frugal number, since it uses more digits than its factorization.

15965586025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 52.

The spelling of 15965586025 in words is "fifteen billion, nine hundred sixty-five million, five hundred eighty-six thousand, twenty-five".