12689339791491 has 64 divisors (see below), whose sum is σ = 22089989652480. Its totient is φ = 7118844084000.

The previous prime is 12689339791489. The next prime is 12689339791543. The reversal of 12689339791491 is 19419793398621.

12689339791491 is a `hidden beast` number, since 1 + 2 + 6 + 8 + 93 + 397 + 9 + 149 + 1 = 666.

It is not a de Polignac number, because 12689339791491 - 2¹ = 12689339791489 is a prime.

It is a super-2 number, since 2×12689339791491² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12689339791411) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 29749705 + ... + 30173226.

It is an arithmetic number, because the mean of its divisors is an integer number (345156088320).

Almost surely, 2^{12689339791491} is an apocalyptic number.

12689339791491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12689339791491 is a deficient number, since it is larger than the sum of its proper divisors (9400649860989).

12689339791491 is a wasteful number, since it uses less digits than its factorization.

12689339791491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59923005 (or 59922999 counting only the distinct ones).

The product of its digits is 158723712, while the sum is 72.

The spelling of 12689339791491 in words is "twelve trillion, six hundred eighty-nine billion, three hundred thirty-nine million, seven hundred ninety-one thousand, four hundred ninety-one".