68183132161 has 9 divisors (see below), whose sum is σ = 71282785539. Its totient is φ = 65212903536.

The previous prime is 68183132159. The next prime is 68183132189. The reversal of 68183132161 is 16123138186.

It is a happy number.

The square root of 68183132161 is 261119.

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

It can be written as a sum of positive squares in only one way, i.e., 18696460225 + 49486671936 = 136735^2 + 222456^2 .

It is not a de Polignac number, because 68183132161 - 2¹ = 68183132159 is a prime.

It is a super-2 number, since 2×68183132161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68183132111) 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, 6000061 + ... + 6011413.

Almost surely, 2^68183132161 is an apocalyptic number.

68183132161 is the 261119-th square number.

68183132161 is the 130560-th centered octagonal number.

It is an amenable number.

68183132161 is a deficient number, since it is larger than the sum of its proper divisors (3099653378).

68183132161 is an frugal number, since it uses more digits than its factorization.

68183132161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22752 (or 11376 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The spelling of 68183132161 in words is "sixty-eight billion, one hundred eighty-three million, one hundred thirty-two thousand, one hundred sixty-one".