12921370464 has 24 divisors (see below), whose sum is σ = 33918597720. Its totient is φ = 4307123456.

The previous prime is 12921370417. The next prime is 12921370481. The reversal of 12921370464 is 46407312921.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

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, 67298709 + ... + 67298900.

It is an arithmetic number, because the mean of its divisors is an integer number (1413274905).

Almost surely, 2^12921370464 is an apocalyptic number.

It is an amenable number.

12921370464 is an abundant number, since it is smaller than the sum of its proper divisors (20997227256).

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

12921370464 is a wasteful number, since it uses less digits than its factorization.

12921370464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134597622 (or 134597614 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 12921370464 in words is "twelve billion, nine hundred twenty-one million, three hundred seventy thousand, four hundred sixty-four".