13297779078544 has 135 divisors (see below), whose sum is σ = 26676901112673. Its totient is φ = 6421421175936.

The previous prime is 13297779078533. The next prime is 13297779078599. The reversal of 13297779078544 is 44587097779231.

The square root of 13297779078544 is 3646612.

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., 9586330592400 + 3711448486144 = 3096180^2 + 1926512^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 79627419549 + ... + 79627419715.

Almost surely, 2^{13297779078544} is an apocalyptic number.

13297779078544 is the 3646612-nd square number.

It is an amenable number.

13297779078544 is an abundant number, since it is smaller than the sum of its proper divisors (13379122034129).

13297779078544 is an frugal number, since it uses more digits than its factorization.

13297779078544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 654 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 746807040, while the sum is 73.

The spelling of 13297779078544 in words is "thirteen trillion, two hundred ninety-seven billion, seven hundred seventy-nine million, seventy-eight thousand, five hundred forty-four".