115661318916 has 96 divisors (see below), whose sum is σ = 318956940288. Its totient is φ = 32159007360.

The previous prime is 115661318911. The next prime is 115661318923. The reversal of 115661318916 is 619813166511.

It is not an unprimeable number, because it can be changed into a prime (115661318911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84771 + ... + 488373.

It is an arithmetic number, because the mean of its divisors is an integer number (3322468128).

Almost surely, 2^115661318916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115661318916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159478470144).

115661318916 is an abundant number, since it is smaller than the sum of its proper divisors (203295621372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115661318916 is a wasteful number, since it uses less digits than its factorization.

115661318916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403801 (or 403799 counting only the distinct ones).

The product of its digits is 233280, while the sum is 48.

The spelling of 115661318916 in words is "one hundred fifteen billion, six hundred sixty-one million, three hundred eighteen thousand, nine hundred sixteen".