15525564325 has 12 divisors (see below), whose sum is σ = 19297441348. Its totient is φ = 12390940800.

The previous prime is 15525564293. The next prime is 15525564361. The reversal of 15525564325 is 52346552551.

It can be written as a sum of positive squares in 6 ways, for example, as 2191550596 + 13334013729 = 46814^2 + 115473^2 .

It is not a de Polignac number, because 15525564325 - 2⁵ = 15525564293 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 11 ways as a sum of consecutive naturals, for example, 727032 + ... + 748081.

Almost surely, 2^15525564325 is an apocalyptic number.

It is an amenable number.

15525564325 is a deficient number, since it is larger than the sum of its proper divisors (3771877023).

15525564325 is a wasteful number, since it uses less digits than its factorization.

15525564325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475544 (or 1475539 counting only the distinct ones).

The product of its digits is 900000, while the sum is 43.

The spelling of 15525564325 in words is "fifteen billion, five hundred twenty-five million, five hundred sixty-four thousand, three hundred twenty-five".