12641904387 has 32 divisors (see below), whose sum is σ = 21414182400. Its totient is φ = 7220604384.

The previous prime is 12641904349. The next prime is 12641904389. The reversal of 12641904387 is 78340914621.

12641904387 is a `hidden beast` number, since 1 + 26 + 4 + 190 + 438 + 7 = 666.

It is not a de Polignac number, because 12641904387 - 2⁶ = 12641904323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12641904389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427773 + ... + 456369.

It is an arithmetic number, because the mean of its divisors is an integer number (669193200).

Almost surely, 2^12641904387 is an apocalyptic number.

12641904387 is a deficient number, since it is larger than the sum of its proper divisors (8772278013).

12641904387 is a wasteful number, since it uses less digits than its factorization.

12641904387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30952 (or 30946 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 12641904387 in words is "twelve billion, six hundred forty-one million, nine hundred four thousand, three hundred eighty-seven".