12131625650 has 12 divisors (see below), whose sum is σ = 22564823802. Its totient is φ = 4852650240.

The previous prime is 12131625643. The next prime is 12131625677. The reversal of 12131625650 is 5652613121.

It can be written as a sum of positive squares in 3 ways, for example, as 4959398929 + 7172226721 = 70423^2 + 84689^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121316207 + ... + 121316306.

Almost surely, 2^12131625650 is an apocalyptic number.

12131625650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12131625650 is a deficient number, since it is larger than the sum of its proper divisors (10433198152).

12131625650 is a wasteful number, since it uses less digits than its factorization.

12131625650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242632525 (or 242632520 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 12131625650 in words is "twelve billion, one hundred thirty-one million, six hundred twenty-five thousand, six hundred fifty".