13081297516 has 24 divisors (see below), whose sum is σ = 26201507360. Its totient is φ = 5597932032.

The previous prime is 13081297477. The next prime is 13081297531. The reversal of 13081297516 is 61579218031.

It is a super-2 number, since 2×13081297516² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328251 + ... + 365938.

Almost surely, 2^13081297516 is an apocalyptic number.

It is an amenable number.

13081297516 is an abundant number, since it is smaller than the sum of its proper divisors (13120209844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13081297516 is a wasteful number, since it uses less digits than its factorization.

13081297516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694873 (or 694871 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 13081297516 in words is "thirteen billion, eighty-one million, two hundred ninety-seven thousand, five hundred sixteen".