13180647249 has 135 divisors (see below), whose sum is σ = 24761895977. Its totient is φ = 6750651600.

The previous prime is 13180647229. The next prime is 13180647251. The reversal of 13180647249 is 94274608131.

The square root of 13180647249 is 114807.

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

13180647249 is a `hidden beast` number, since 131 + 8 + 0 + 6 + 472 + 49 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-13180647249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13180647209) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 185642884 + ... + 185642954.

Almost surely, 2^13180647249 is an apocalyptic number.

13180647249 is the 114807-th square number.

13180647249 is the 57404-th centered octagonal number.

It is an amenable number.

13180647249 is a deficient number, since it is larger than the sum of its proper divisors (11581248728).

13180647249 is an frugal number, since it uses more digits than its factorization.

13180647249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 13180647249 in words is "thirteen billion, one hundred eighty million, six hundred forty-seven thousand, two hundred forty-nine".