168683077936589 has 4 divisors (see below), whose sum is σ = 169006845841020. Its totient is φ = 168359310032160.

The previous prime is 168683077936463. The next prime is 168683077936619. The reversal of 168683077936589 is 985639770386861.

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 22717777744489 + 145965300192100 = 4766317^2 + 12081610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168683077936589 is a prime.

It is a super-2 number, since 2×168683077936589² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168683077936589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168683077939589) 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, 161883951434 + ... + 161883952475.

It is an arithmetic number, because the mean of its divisors is an integer number (42251711460255).

Almost surely, 2^{168683077936589} is an apocalyptic number.

It is an amenable number.

168683077936589 is a deficient number, since it is larger than the sum of its proper divisors (323767904431).

168683077936589 is an equidigital number, since it uses as much as digits as its factorization.

168683077936589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323767904430.

The product of its (nonzero) digits is 19752284160, while the sum is 86.

The spelling of 168683077936589 in words is "one hundred sixty-eight trillion, six hundred eighty-three billion, seventy-seven million, nine hundred thirty-six thousand, five hundred eighty-nine".