11561616117 has 12 divisors (see below), whose sum is σ = 17107432524. Its totient is φ = 7519750080.

The previous prime is 11561616113. The next prime is 11561616127. The reversal of 11561616117 is 71161616511.

It is a happy number.

11561616117 is a `hidden beast` number, since 1 + 15 + 616 + 16 + 1 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 306740196 + 11254875921 = 17514^2 + 106089^2 .

It is not a de Polignac number, because 11561616117 - 2² = 11561616113 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11561616113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15665778 + ... + 15666515.

It is an arithmetic number, because the mean of its divisors is an integer number (1425619377).

Almost surely, 2^11561616117 is an apocalyptic number.

It is an amenable number.

11561616117 is a deficient number, since it is larger than the sum of its proper divisors (5545816407).

11561616117 is a wasteful number, since it uses less digits than its factorization.

11561616117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31332340 (or 31332337 counting only the distinct ones).

The product of its digits is 7560, while the sum is 36.

The spelling of 11561616117 in words is "eleven billion, five hundred sixty-one million, six hundred sixteen thousand, one hundred seventeen".