117617606681 has 2 divisors, whose sum is σ = 117617606682. Its totient is φ = 117617606680.

The previous prime is 117617606653. The next prime is 117617606693. The reversal of 117617606681 is 186606716711.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83877427456 + 33740179225 = 289616^2 + 183685^2 .

It is a cyclic number.

It is not a de Polignac number, because 117617606681 - 2¹⁰ = 117617605657 is a prime.

It is a super-2 number, since 2×117617606681² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (117617606651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58808803340 + 58808803341.

It is an arithmetic number, because the mean of its divisors is an integer number (58808803341).

Almost surely, 2^117617606681 is an apocalyptic number.

It is an amenable number.

117617606681 is a deficient number, since it is larger than the sum of its proper divisors (1).

117617606681 is an equidigital number, since it uses as much as digits as its factorization.

117617606681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 117617606681 in words is "one hundred seventeen billion, six hundred seventeen million, six hundred six thousand, six hundred eighty-one".