117773219681 has 4 divisors (see below), whose sum is σ = 126832698132. Its totient is φ = 108713741232.

The previous prime is 117773219623. The next prime is 117773219737. The reversal of 117773219681 is 186912377711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17217638656 + 100555581025 = 131216^2 + 317105^2 .

It is a cyclic number.

It is not a de Polignac number, because 117773219681 - 2⁶ = 117773219617 is a prime.

It is a super-2 number, since 2×117773219681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117773219621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4529739206 + ... + 4529739231.

It is an arithmetic number, because the mean of its divisors is an integer number (31708174533).

Almost surely, 2^117773219681 is an apocalyptic number.

It is an amenable number.

117773219681 is a deficient number, since it is larger than the sum of its proper divisors (9059478451).

117773219681 is an equidigital number, since it uses as much as digits as its factorization.

117773219681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9059478450.

The product of its digits is 889056, while the sum is 53.

The spelling of 117773219681 in words is "one hundred seventeen billion, seven hundred seventy-three million, two hundred nineteen thousand, six hundred eighty-one".