117106999681 has 81 divisors (see below), whose sum is σ = 150372612513. Its totient is φ = 90918087120.

The previous prime is 117106999657. The next prime is 117106999693. The reversal of 117106999681 is 186999601711.

The square root of 117106999681 is 342209.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 117106999681 - 2¹¹ = 117106997633 is a prime.

It is a super-2 number, since 2×117106999681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (117106999651) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1410927666 + ... + 1410927748.

Almost surely, 2^117106999681 is an apocalyptic number.

117106999681 is the 342209-th square number.

117106999681 is the 171105-th centered octagonal number.

It is an amenable number.

117106999681 is a deficient number, since it is larger than the sum of its proper divisors (33265612832).

117106999681 is an frugal number, since it uses more digits than its factorization.

117106999681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 58.

The spelling of 117106999681 in words is "one hundred seventeen billion, one hundred six million, nine hundred ninety-nine thousand, six hundred eighty-one".