12150557635225 has 81 divisors (see below), whose sum is σ = 16740619692573. Its totient is φ = 8745979587840.

The previous prime is 12150557635211. The next prime is 12150557635241. The reversal of 12150557635225 is 52253675505121.

The square root of 12150557635225 is 3485765.

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

12150557635225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 284213735689 + 11866343899536 = 533117^2 + 3444756^2 .

It is not a de Polignac number, because 12150557635225 - 2²¹ = 12150555538073 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 6814669684 + ... + 6814671466.

Almost surely, 2^{12150557635225} is an apocalyptic number.

12150557635225 is the 3485765-th square number.

12150557635225 is the 1742883-rd centered octagonal number.

It is an amenable number.

12150557635225 is a deficient number, since it is larger than the sum of its proper divisors (4590062057348).

12150557635225 is an frugal number, since it uses more digits than its factorization.

12150557635225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3656 (or 1828 counting only the distinct ones).

The product of its (nonzero) digits is 3150000, while the sum is 49.

Multiplying 12150557635225 by its sum of digits (49), we get a square (595377324126025 = 24400355²).

The spelling of 12150557635225 in words is "twelve trillion, one hundred fifty billion, five hundred fifty-seven million, six hundred thirty-five thousand, two hundred twenty-five".