168293778319 has 2 divisors, whose sum is σ = 168293778320. Its totient is φ = 168293778318.

The previous prime is 168293778313. The next prime is 168293778343. The reversal of 168293778319 is 913877392861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 168293778319 - 2³ = 168293778311 is a prime.

It is a super-2 number, since 2×168293778319² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168293778311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84146889159 + 84146889160.

It is an arithmetic number, because the mean of its divisors is an integer number (84146889160).

Almost surely, 2^168293778319 is an apocalyptic number.

168293778319 is a deficient number, since it is larger than the sum of its proper divisors (1).

168293778319 is an equidigital number, since it uses as much as digits as its factorization.

168293778319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 64.

The spelling of 168293778319 in words is "one hundred sixty-eight billion, two hundred ninety-three million, seven hundred seventy-eight thousand, three hundred nineteen".