13116531161 has 8 divisors (see below), whose sum is σ = 13449541704. Its totient is φ = 12787326720.

The previous prime is 13116531151. The next prime is 13116531167. The reversal of 13116531161 is 16113561131.

It can be written as a sum of positive squares in 4 ways, for example, as 532178761 + 12584352400 = 23069^2 + 112180^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13116531161 - 2²² = 13112336857 is a prime.

It is a super-3 number, since 3×13116531161³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13116531167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 944546 + ... + 958331.

It is an arithmetic number, because the mean of its divisors is an integer number (1681192713).

Almost surely, 2^13116531161 is an apocalyptic number.

It is an amenable number.

13116531161 is a deficient number, since it is larger than the sum of its proper divisors (333010543).

13116531161 is a wasteful number, since it uses less digits than its factorization.

13116531161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1903051.

The product of its digits is 1620, while the sum is 29.

The spelling of 13116531161 in words is "thirteen billion, one hundred sixteen million, five hundred thirty-one thousand, one hundred sixty-one".