13756569730225 has 27 divisors (see below), whose sum is σ = 19843337222571. Its totient is φ = 9432987370800.

The previous prime is 13756569730213. The next prime is 13756569730237. The reversal of 13756569730225 is 52203796565731.

The square root of 13756569730225 is 3708985.

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

It is an interprime number because it is at equal distance from previous prime (13756569730213) and next prime (13756569730237).

It can be written as a sum of positive squares in only one way, i.e., 4952365102881 + 8804204627344 = 2225391^2 + 2967188^2 .

It is not a de Polignac number, because 13756569730225 - 2⁷ = 13756569730097 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, 129761490 + ... + 129867460.

Almost surely, 2^{13756569730225} is an apocalyptic number.

13756569730225 is the 3708985-th square number.

13756569730225 is the 1854493-rd centered octagonal number.

It is an amenable number.

13756569730225 is a deficient number, since it is larger than the sum of its proper divisors (6086767492346).

13756569730225 is an frugal number, since it uses more digits than its factorization.

13756569730225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211966 (or 105983 counting only the distinct ones).

The product of its (nonzero) digits is 71442000, while the sum is 61.

The spelling of 13756569730225 in words is "thirteen trillion, seven hundred fifty-six billion, five hundred sixty-nine million, seven hundred thirty thousand, two hundred twenty-five".