12154915125 has 108 divisors (see below), whose sum is σ = 23259624804. Its totient is φ = 6105931200.

The previous prime is 12154915121. The next prime is 12154915159. The reversal of 12154915125 is 52151945121.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

12154915125 is a `hidden beast` number, since 1 + 2 + 1 + 54 + 91 + 512 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 190274436 + 11964640689 = 13794^2 + 109383^2 .

It is not a de Polignac number, because 12154915125 - 2² = 12154915121 is a prime.

Its product of digits (18000) is a multiple of the sum of its prime divisors (200).

It is a self number, because there is not a number n which added to its sum of digits gives 12154915125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12154915121) by changing a digit.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 70259539 + ... + 70259711.

Almost surely, 2^12154915125 is an apocalyptic number.

12154915125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12154915125 is a deficient number, since it is larger than the sum of its proper divisors (11104709679).

12154915125 is an equidigital number, since it uses as much as digits as its factorization.

12154915125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 200 counting only the distinct ones).

The product of its digits is 18000, while the sum is 36.

Multiplying 12154915125 by its product of digits (18000), we get a square (218788472250000 = 14791500²).

The spelling of 12154915125 in words is "twelve billion, one hundred fifty-four million, nine hundred fifteen thousand, one hundred twenty-five".