12861374464 has 51 divisors (see below), whose sum is σ = 25780748203. Its totient is φ = 6416171008.

The previous prime is 12861374431. The next prime is 12861374473. The reversal of 12861374464 is 46447316821.

The square root of 12861374464 is 113408.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 29032227 + ... + 29032669.

Almost surely, 2^12861374464 is an apocalyptic number.

12861374464 is the 113408-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12861374464

12861374464 is an abundant number, since it is smaller than the sum of its proper divisors (12919373739).

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

12861374464 is an frugal number, since it uses more digits than its factorization.

12861374464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 445 counting only the distinct ones).

The product of its digits is 774144, while the sum is 46.

The spelling of 12861374464 in words is "twelve billion, eight hundred sixty-one million, three hundred seventy-four thousand, four hundred sixty-four".