13116261552506 has 12 divisors (see below), whose sum is σ = 22886538015258. Its totient is φ = 5621254951032.

The previous prime is 13116261552503. The next prime is 13116261552571. The reversal of 13116261552506 is 60525516261131.

It can be written as a sum of positive squares in only one way, i.e., 12604594587025 + 511666965481 = 3550295^2 + 715309^2 .

It is a super-2 number, since 2×13116261552506² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13116261552503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 66919701701 + ... + 66919701896.

Almost surely, 2^{13116261552506} is an apocalyptic number.

13116261552506 is a deficient number, since it is larger than the sum of its proper divisors (9770276462752).

13116261552506 is a wasteful number, since it uses less digits than its factorization.

13116261552506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133839403613 (or 133839403606 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 13116261552506 in words is "thirteen trillion, one hundred sixteen billion, two hundred sixty-one million, five hundred fifty-two thousand, five hundred six".