168408750761 has 2 divisors, whose sum is σ = 168408750762. Its totient is φ = 168408750760.

The previous prime is 168408750733. The next prime is 168408750883. The reversal of 168408750761 is 167057804861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158289396736 + 10119354025 = 397856^2 + 100595^2 .

It is a cyclic number.

It is not a de Polignac number, because 168408750761 - 2³⁴ = 151228881577 is a prime.

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 (168408750361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84204375380 + 84204375381.

It is an arithmetic number, because the mean of its divisors is an integer number (84204375381).

Almost surely, 2^168408750761 is an apocalyptic number.

It is an amenable number.

168408750761 is a deficient number, since it is larger than the sum of its proper divisors (1).

168408750761 is an equidigital number, since it uses as much as digits as its factorization.

168408750761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 168408750761 in words is "one hundred sixty-eight billion, four hundred eight million, seven hundred fifty thousand, seven hundred sixty-one".