13261516516 has 12 divisors (see below), whose sum is σ = 23224468540. Its totient is φ = 6625954080.

The previous prime is 13261516493. The next prime is 13261516531. The reversal of 13261516516 is 61561516231.

It can be written as a sum of positive squares in 2 ways, for example, as 7491594916 + 5769921600 = 86554^2 + 75960^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194831 + ... + 1205878.

Almost surely, 2^13261516516 is an apocalyptic number.

It is an amenable number.

13261516516 is a deficient number, since it is larger than the sum of its proper divisors (9962952024).

13261516516 is a wasteful number, since it uses less digits than its factorization.

13261516516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2402094 (or 2402092 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The spelling of 13261516516 in words is "thirteen billion, two hundred sixty-one million, five hundred sixteen thousand, five hundred sixteen".