12891740964 has 12 divisors (see below), whose sum is σ = 30080728944. Its totient is φ = 4297246984.

The previous prime is 12891740959. The next prime is 12891740989. The reversal of 12891740964 is 46904719821.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537155862 + ... + 537155885.

It is an arithmetic number, because the mean of its divisors is an integer number (2506727412).

Almost surely, 2^12891740964 is an apocalyptic number.

It is an amenable number.

12891740964 is an abundant number, since it is smaller than the sum of its proper divisors (17188987980).

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

12891740964 is a wasteful number, since it uses less digits than its factorization.

12891740964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074311754 (or 1074311752 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The spelling of 12891740964 in words is "twelve billion, eight hundred ninety-one million, seven hundred forty thousand, nine hundred sixty-four".