117738883161 has 9 divisors (see below), whose sum is σ = 170068762591. Its totient is φ = 78491902512.

The previous prime is 117738883151. The next prime is 117738883183. The reversal of 117738883161 is 161388837711.

The square root of 117738883161 is 343131.

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

117738883161 is a `hidden beast` number, since 1 + 177 + 388 + 8 + 31 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2508507225 + 115230375936 = 50085^2 + 339456^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 117738883161 - 2¹³ = 117738874969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 117738883098 and 117738883107.

It is not an unprimeable number, because it can be changed into a prime (117738883151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 972205 + ... + 1086581.

Almost surely, 2^117738883161 is an apocalyptic number.

117738883161 is the 343131-st square number.

117738883161 is the 171566-th centered octagonal number.

It is an amenable number.

117738883161 is a deficient number, since it is larger than the sum of its proper divisors (52329879430).

117738883161 is an frugal number, since it uses more digits than its factorization.

117738883161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228760 (or 114380 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The spelling of 117738883161 in words is "one hundred seventeen billion, seven hundred thirty-eight million, eight hundred eighty-three thousand, one hundred sixty-one".