13649239925 has 6 divisors (see below), whose sum is σ = 16925057538. Its totient is φ = 10919391920.

The previous prime is 13649239811. The next prime is 13649239943. The reversal of 13649239925 is 52993294631.

It can be written as a sum of positive squares in 3 ways, for example, as 361836484 + 13287403441 = 19022^2 + 115271^2 .

It is not a de Polignac number, because 13649239925 - 2¹⁰ = 13649238901 is a prime.

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 5 ways as a sum of consecutive naturals, for example, 272984774 + ... + 272984823.

It is an arithmetic number, because the mean of its divisors is an integer number (2820842923).

Almost surely, 2^13649239925 is an apocalyptic number.

It is an amenable number.

13649239925 is a deficient number, since it is larger than the sum of its proper divisors (3275817613).

13649239925 is an equidigital number, since it uses as much as digits as its factorization.

13649239925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545969607 (or 545969602 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 53.

The spelling of 13649239925 in words is "thirteen billion, six hundred forty-nine million, two hundred thirty-nine thousand, nine hundred twenty-five".