12500054109 has 8 divisors (see below), whose sum is σ = 18518598720. Its totient is φ = 8333369388.

The previous prime is 12500054101. The next prime is 12500054113. The reversal of 12500054109 is 90145000521.

12500054109 is a `hidden beast` number, since 1 + 2 + 500 + 0 + 54 + 109 = 666.

It is not a de Polignac number, because 12500054109 - 2³ = 12500054101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 462964967 = 12500054109 / (1 + 2 + 5 + 0 + 0 + 0 + 5 + 4 + 1 + 0 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12500054101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231482457 + ... + 231482510.

It is an arithmetic number, because the mean of its divisors is an integer number (2314824840).

Almost surely, 2^12500054109 is an apocalyptic number.

It is an amenable number.

12500054109 is a deficient number, since it is larger than the sum of its proper divisors (6018544611).

12500054109 is an equidigital number, since it uses as much as digits as its factorization.

12500054109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462964976 (or 462964970 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 12500054109 in words is "twelve billion, five hundred million, fifty-four thousand, one hundred nine".