12691429632906 has 64 divisors (see below), whose sum is σ = 25736478831360. Its totient is φ = 4171808453120.

The previous prime is 12691429632859. The next prime is 12691429632953. The reversal of 12691429632906 is 60923692419621.

It is an interprime number because it is at equal distance from previous prime (12691429632859) and next prime (12691429632953).

It is a super-2 number, since 2×12691429632906² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12691429632906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 306676336 + ... + 306717716.

It is an arithmetic number, because the mean of its divisors is an integer number (402132481740).

Almost surely, 2^{12691429632906} is an apocalyptic number.

12691429632906 is an abundant number, since it is smaller than the sum of its proper divisors (13045049198454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12691429632906 is a wasteful number, since it uses less digits than its factorization.

12691429632906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42991.

The product of its (nonzero) digits is 15116544, while the sum is 60.

The spelling of 12691429632906 in words is "twelve trillion, six hundred ninety-one billion, four hundred twenty-nine million, six hundred thirty-two thousand, nine hundred six".