12641634887 has 8 divisors (see below), whose sum is σ = 14783573376. Its totient is φ = 10583694072.

The previous prime is 12641634883. The next prime is 12641634893. The reversal of 12641634887 is 78843614621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12641634887 - 2² = 12641634883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12641634881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20999093 + ... + 20999694.

It is an arithmetic number, because the mean of its divisors is an integer number (1847946672).

Almost surely, 2^12641634887 is an apocalyptic number.

12641634887 is a deficient number, since it is larger than the sum of its proper divisors (2141938489).

12641634887 is an equidigital number, since it uses as much as digits as its factorization.

12641634887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41998837.

The product of its digits is 1548288, while the sum is 50.

The spelling of 12641634887 in words is "twelve billion, six hundred forty-one million, six hundred thirty-four thousand, eight hundred eighty-seven".