13109866770025 has 27 divisors (see below), whose sum is σ = 16296720467781. Its totient is φ = 10461838463040.

The previous prime is 13109866769983. The next prime is 13109866770041. The reversal of 13109866770025 is 52007766890131.

The square root of 13109866770025 is 3620755.

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

It can be written as a sum of positive squares in 4 ways, for example, as 214499585881 + 12895367184144 = 463141^2 + 3591012^2 .

It is not a de Polignac number, because 13109866770025 - 2²⁵ = 13109833215593 is a prime.

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, 10988990829 + ... + 10988992021.

Almost surely, 2^{13109866770025} is an apocalyptic number.

13109866770025 is the 3620755-th square number.

13109866770025 is the 1810378-th centered octagonal number.

It is an amenable number.

13109866770025 is a deficient number, since it is larger than the sum of its proper divisors (3186853697756).

13109866770025 is an frugal number, since it uses more digits than its factorization.

13109866770025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610 (or 1805 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 13109866770025 in words is "thirteen trillion, one hundred nine billion, eight hundred sixty-six million, seven hundred seventy thousand, twenty-five".