15265838025 has 27 divisors (see below), whose sum is σ = 27346132021. Its totient is φ = 8140791840.

The previous prime is 15265838017. The next prime is 15265838051. The reversal of 15265838025 is 52083856251.

The square root of 15265838025 is 123555.

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

15265838025 is a `hidden beast` number, since 1 + 5 + 265 + 8 + 380 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 741321 + 15265096704 = 861^2 + 123552^2 .

It is not a de Polignac number, because 15265838025 - 2³ = 15265838017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1849207 + ... + 1857443.

Almost surely, 2^15265838025 is an apocalyptic number.

15265838025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15265838025 is the 123555-th square number.

15265838025 is the 61778-th centered octagonal number.

It is an amenable number.

15265838025 is a deficient number, since it is larger than the sum of its proper divisors (12080293996).

15265838025 is an frugal number, since it uses more digits than its factorization.

15265838025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16490 (or 8245 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The spelling of 15265838025 in words is "fifteen billion, two hundred sixty-five million, eight hundred thirty-eight thousand, twenty-five".