115661165170 has 16 divisors (see below), whose sum is σ = 208930992408. Its totient is φ = 46099822720.

The previous prime is 115661165161. The next prime is 115661165171. The reversal of 115661165170 is 71561166511.

It can be written as a sum of positive squares in 4 ways, for example, as 71788092489 + 43873072681 = 267933^2 + 209459^2 .

It is a super-2 number, since 2×115661165170² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115661165171) 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, 20577469 + ... + 20583088.

Almost surely, 2^115661165170 is an apocalyptic number.

115661165170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115661165170 is a deficient number, since it is larger than the sum of its proper divisors (93269827238).

115661165170 is a wasteful number, since it uses less digits than its factorization.

115661165170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41160845.

The product of its (nonzero) digits is 37800, while the sum is 40.

The spelling of 115661165170 in words is "one hundred fifteen billion, six hundred sixty-one million, one hundred sixty-five thousand, one hundred seventy".