12641694467 has 4 divisors (see below), whose sum is σ = 12643083576. Its totient is φ = 12640305360.

The previous prime is 12641694437. The next prime is 12641694487. The reversal of 12641694467 is 76449614621.

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

It is a cyclic number.

It is not a de Polignac number, because 12641694467 - 2¹⁴ = 12641678083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12641694437) 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, 680813 + ... + 699134.

It is an arithmetic number, because the mean of its divisors is an integer number (3160770894).

Almost surely, 2^12641694467 is an apocalyptic number.

12641694467 is a deficient number, since it is larger than the sum of its proper divisors (1389109).

12641694467 is an equidigital number, since it uses as much as digits as its factorization.

12641694467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389108.

The product of its digits is 1741824, while the sum is 50.

The spelling of 12641694467 in words is "twelve billion, six hundred forty-one million, six hundred ninety-four thousand, four hundred sixty-seven".