13663751725 has 12 divisors (see below), whose sum is σ = 18246364276. Its totient is φ = 10090154880.

The previous prime is 13663751707. The next prime is 13663751747. The reversal of 13663751725 is 52715736631.

It can be written as a sum of positive squares in 6 ways, for example, as 1710484164 + 11953267561 = 41358^2 + 109331^2 .

It is not a de Polignac number, because 13663751725 - 2¹⁷ = 13663620653 is a prime.

It is a super-2 number, since 2×13663751725² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21020832 + ... + 21021481.

Almost surely, 2^13663751725 is an apocalyptic number.

It is an amenable number.

13663751725 is a deficient number, since it is larger than the sum of its proper divisors (4582612551).

13663751725 is a wasteful number, since it uses less digits than its factorization.

13663751725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42042336 (or 42042331 counting only the distinct ones).

The product of its digits is 793800, while the sum is 46.

The spelling of 13663751725 in words is "thirteen billion, six hundred sixty-three million, seven hundred fifty-one thousand, seven hundred twenty-five".