13681513025 has 12 divisors (see below), whose sum is σ = 17133050364. Its totient is φ = 10836840000.

The previous prime is 13681512979. The next prime is 13681513031. The reversal of 13681513025 is 52031518631.

It is a Cunningham number, because it is equal to 116968²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 536431921 + 13145081104 = 23161^2 + 114652^2 .

It is not a de Polignac number, because 13681513025 - 2¹⁴ = 13681496641 is a prime.

It is a Duffinian 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, 2706686 + ... + 2711735.

It is an arithmetic number, because the mean of its divisors is an integer number (1427754197).

Almost surely, 2^13681513025 is an apocalyptic number.

It is an amenable number.

13681513025 is a deficient number, since it is larger than the sum of its proper divisors (3451537339).

13681513025 is a wasteful number, since it uses less digits than its factorization.

13681513025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5418532 (or 5418527 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 13681513025 in words is "thirteen billion, six hundred eighty-one million, five hundred thirteen thousand, twenty-five".