12969565456 has 45 divisors (see below), whose sum is σ = 25551159109. Its totient is φ = 6377504000.

The previous prime is 12969565379. The next prime is 12969565459. The reversal of 12969565456 is 65456596921.

The square root of 12969565456 is 113884.

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

It can be written as a sum of positive squares in only one way, i.e., 12840515856 + 129049600 = 113316^2 + 11360^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12969565456.

It is not an unprimeable number, because it can be changed into a prime (12969565459) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32342856 + ... + 32343256.

Almost surely, 2^12969565456 is an apocalyptic number.

12969565456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

12969565456 is the 113884-th square number.

It is an amenable number.

12969565456 is a deficient number, since it is larger than the sum of its proper divisors (12581593653).

12969565456 is an frugal number, since it uses more digits than its factorization.

12969565456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 474 counting only the distinct ones).

The product of its digits is 17496000, while the sum is 58.

The spelling of 12969565456 in words is "twelve billion, nine hundred sixty-nine million, five hundred sixty-five thousand, four hundred fifty-six".