13426591971 has 16 divisors (see below), whose sum is σ = 19281368736. Its totient is φ = 8261592576.

The previous prime is 13426591967. The next prime is 13426591979. The reversal of 13426591971 is 17919562431.

It is not a de Polignac number, because 13426591971 - 2² = 13426591967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13426591971.

It is not an unprimeable number, because it can be changed into a prime (13426591979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 535021 + ... + 559553.

It is an arithmetic number, because the mean of its divisors is an integer number (1205085546).

Almost surely, 2^13426591971 is an apocalyptic number.

13426591971 is a deficient number, since it is larger than the sum of its proper divisors (5854776765).

13426591971 is a wasteful number, since it uses less digits than its factorization.

13426591971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38582.

The product of its digits is 408240, while the sum is 48.

The spelling of 13426591971 in words is "thirteen billion, four hundred twenty-six million, five hundred ninety-one thousand, nine hundred seventy-one".