12641114665 has 4 divisors (see below), whose sum is σ = 15169337604. Its totient is φ = 10112891728.

The previous prime is 12641114659. The next prime is 12641114719. The reversal of 12641114665 is 56641114621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8950673664 + 3690441001 = 94608^2 + 60749^2 .

It is a cyclic number.

It is not a de Polignac number, because 12641114665 - 2³ = 12641114657 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1264111462 + ... + 1264111471.

It is an arithmetic number, because the mean of its divisors is an integer number (3792334401).

Almost surely, 2^12641114665 is an apocalyptic number.

It is an amenable number.

12641114665 is a deficient number, since it is larger than the sum of its proper divisors (2528222939).

12641114665 is an equidigital number, since it uses as much as digits as its factorization.

12641114665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2528222938.

The product of its digits is 34560, while the sum is 37.

The spelling of 12641114665 in words is "twelve billion, six hundred forty-one million, one hundred fourteen thousand, six hundred sixty-five".