115671115661 has 8 divisors (see below), whose sum is σ = 116131077624. Its totient is φ = 115211496960.

The previous prime is 115671115639. The next prime is 115671115687. The reversal of 115671115661 is 166511176511.

It can be written as a sum of positive squares in 4 ways, for example, as 46254674761 + 69416440900 = 215069^2 + 263470^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115671115661 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 (115671115601) 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, 600341 + ... + 769253.

It is an arithmetic number, because the mean of its divisors is an integer number (14516384703).

Almost surely, 2^115671115661 is an apocalyptic number.

It is an amenable number.

115671115661 is a deficient number, since it is larger than the sum of its proper divisors (459961963).

115671115661 is a wasteful number, since it uses less digits than its factorization.

115671115661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171631.

The product of its digits is 37800, while the sum is 41.

The spelling of 115671115661 in words is "one hundred fifteen billion, six hundred seventy-one million, one hundred fifteen thousand, six hundred sixty-one".