12637811941 has 4 divisors (see below), whose sum is σ = 12648335884. Its totient is φ = 12627288000.

The previous prime is 12637811897. The next prime is 12637811947. The reversal of 12637811941 is 14911873621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14911873621 = 69539 ⋅214439.

It can be written as a sum of positive squares in 2 ways, for example, as 1262736225 + 11375075716 = 35535^2 + 106654^2 .

It is a cyclic number.

It is not a de Polignac number, because 12637811941 - 2¹¹ = 12637809893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12637811947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5260170 + ... + 5262571.

It is an arithmetic number, because the mean of its divisors is an integer number (3162083971).

Almost surely, 2^12637811941 is an apocalyptic number.

It is an amenable number.

12637811941 is a deficient number, since it is larger than the sum of its proper divisors (10523943).

12637811941 is a wasteful number, since it uses less digits than its factorization.

12637811941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10523942.

The product of its digits is 72576, while the sum is 43.

The spelling of 12637811941 in words is "twelve billion, six hundred thirty-seven million, eight hundred eleven thousand, nine hundred forty-one".