12694364157 has 4 divisors (see below), whose sum is σ = 16925818880. Its totient is φ = 8462909436.

The previous prime is 12694364147. The next prime is 12694364167. The reversal of 12694364157 is 75146349621.

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 an interprime number because it is at equal distance from previous prime (12694364147) and next prime (12694364167).

It is not a de Polignac number, because 12694364157 - 2⁷ = 12694364029 is a prime.

It is a super-2 number, since 2×12694364157² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12694364147) 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, 2115727357 + ... + 2115727362.

It is an arithmetic number, because the mean of its divisors is an integer number (4231454720).

Almost surely, 2^12694364157 is an apocalyptic number.

It is an amenable number.

12694364157 is a deficient number, since it is larger than the sum of its proper divisors (4231454723).

12694364157 is an equidigital number, since it uses as much as digits as its factorization.

12694364157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231454722.

The product of its digits is 1088640, while the sum is 48.

The spelling of 12694364157 in words is "twelve billion, six hundred ninety-four million, three hundred sixty-four thousand, one hundred fifty-seven".