12694739641 has 4 divisors (see below), whose sum is σ = 12695035392. Its totient is φ = 12694443892.

The previous prime is 12694739633. The next prime is 12694739657. The reversal of 12694739641 is 14693749621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12694739641 - 2³ = 12694739633 is a prime.

It is a super-2 number, since 2×12694739641² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12694739671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69721 + ... + 173926.

It is an arithmetic number, because the mean of its divisors is an integer number (3173758848).

Almost surely, 2^12694739641 is an apocalyptic number.

It is an amenable number.

12694739641 is a deficient number, since it is larger than the sum of its proper divisors (295751).

12694739641 is an equidigital number, since it uses as much as digits as its factorization.

12694739641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295750.

The product of its digits is 1959552, while the sum is 52.

The spelling of 12694739641 in words is "twelve billion, six hundred ninety-four million, seven hundred thirty-nine thousand, six hundred forty-one".