23515517056525 has 12 divisors (see below), whose sum is σ = 31402259700532. Its totient is φ = 17365304903040.

The previous prime is 23515517056513. The next prime is 23515517056589. The reversal of 23515517056525 is 52565071551532.

It can be written as a sum of positive squares in 6 ways, for example, as 3935228355081 + 19580288701444 = 1983741^2 + 4424962^2 .

It is not a de Polignac number, because 23515517056525 - 2²¹ = 23515514959373 is a prime.

It is a Duffinian number.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 36177718224 + ... + 36177718873.

Almost surely, 2^{23515517056525} is an apocalyptic number.

23515517056525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23515517056525 is a deficient number, since it is larger than the sum of its proper divisors (7886742644007).

23515517056525 is a wasteful number, since it uses less digits than its factorization.

23515517056525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72355437120 (or 72355437115 counting only the distinct ones).

The product of its (nonzero) digits is 7875000, while the sum is 52.

The spelling of 23515517056525 in words is "twenty-three trillion, five hundred fifteen billion, five hundred seventeen million, fifty-six thousand, five hundred twenty-five".