13128249525 has 12 divisors (see below), whose sum is σ = 21705372672. Its totient is φ = 7001733040.

The previous prime is 13128249517. The next prime is 13128249527. The reversal of 13128249525 is 52594282131.

It is not a de Polignac number, because 13128249525 - 2³ = 13128249517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13128249527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87521589 + ... + 87521738.

It is an arithmetic number, because the mean of its divisors is an integer number (1808781056).

Almost surely, 2^13128249525 is an apocalyptic number.

13128249525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13128249525 is a deficient number, since it is larger than the sum of its proper divisors (8577123147).

13128249525 is a wasteful number, since it uses less digits than its factorization.

13128249525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175043340 (or 175043335 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The spelling of 13128249525 in words is "thirteen billion, one hundred twenty-eight million, two hundred forty-nine thousand, five hundred twenty-five".