12640250138900 has 72 divisors (see below), whose sum is σ = 28874678256480. Its totient is φ = 4789709850240.

The previous prime is 12640250138891. The next prime is 12640250138903. The reversal of 12640250138900 is 983105204621.

12640250138900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12640250138900² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640250138903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33933059 + ... + 34303541.

Almost surely, 2^{12640250138900} is an apocalyptic number.

12640250138900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12640250138900 is an abundant number, since it is smaller than the sum of its proper divisors (16234428117580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12640250138900 is a wasteful number, since it uses less digits than its factorization.

12640250138900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388473 (or 388466 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 12640250138900 in words is "twelve trillion, six hundred forty billion, two hundred fifty million, one hundred thirty-eight thousand, nine hundred".