168955958377 has 2 divisors, whose sum is σ = 168955958378. Its totient is φ = 168955958376.

The previous prime is 168955958333. The next prime is 168955958383. The reversal of 168955958377 is 773859559861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161106707161 + 7849251216 = 401381^2 + 88596^2 .

It is a cyclic number.

It is not a de Polignac number, because 168955958377 - 2¹¹ = 168955956329 is a prime.

It is a super-2 number, since 2×168955958377² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (168955938377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84477979188 + 84477979189.

It is an arithmetic number, because the mean of its divisors is an integer number (84477979189).

Almost surely, 2^168955958377 is an apocalyptic number.

It is an amenable number.

168955958377 is a deficient number, since it is larger than the sum of its proper divisors (1).

168955958377 is an equidigital number, since it uses as much as digits as its factorization.

168955958377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 571536000, while the sum is 73.

The spelling of 168955958377 in words is "one hundred sixty-eight billion, nine hundred fifty-five million, nine hundred fifty-eight thousand, three hundred seventy-seven".