115161516661 has 4 divisors (see below), whose sum is σ = 115171592032. Its totient is φ = 115151441292.

The previous prime is 115161516641. The next prime is 115161516731. The reversal of 115161516661 is 166615161511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 115161516661 - 2⁹ = 115161516149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115161516601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5020521 + ... + 5043406.

It is an arithmetic number, because the mean of its divisors is an integer number (28792898008).

Almost surely, 2^115161516661 is an apocalyptic number.

It is an amenable number.

115161516661 is a deficient number, since it is larger than the sum of its proper divisors (10075371).

115161516661 is a wasteful number, since it uses less digits than its factorization.

115161516661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10075370.

The product of its digits is 32400, while the sum is 40.

The spelling of 115161516661 in words is "one hundred fifteen billion, one hundred sixty-one million, five hundred sixteen thousand, six hundred sixty-one".