115515015625 has 21 divisors (see below), whose sum is σ = 144445045611. Its totient is φ = 92378025000.

The previous prime is 115515015617. The next prime is 115515015643. The reversal of 115515015625 is 526510515511.

The square root of 115515015625 is 339875.

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

It can be written as a sum of positive squares in 3 ways, for example, as 101202243129 + 14312772496 = 318123^2 + 119636^2 .

It is not a de Polignac number, because 115515015625 - 2³ = 115515015617 is a prime.

It is a Duffinian 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 20 ways as a sum of consecutive naturals, for example, 42483016 + ... + 42485734.

Almost surely, 2^115515015625 is an apocalyptic number.

115515015625 is the 339875-th square number.

115515015625 is the 169938-th centered octagonal number.

It is an amenable number.

115515015625 is a deficient number, since it is larger than the sum of its proper divisors (28930029986).

115515015625 is an frugal number, since it uses more digits than its factorization.

115515015625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468 (or 2724 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 37.

The spelling of 115515015625 in words is "one hundred fifteen billion, five hundred fifteen million, fifteen thousand, six hundred twenty-five".