168538878359 has 2 divisors, whose sum is σ = 168538878360. Its totient is φ = 168538878358.

The previous prime is 168538878293. The next prime is 168538878371. The reversal of 168538878359 is 953878835861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168538878359 - 2⁸ = 168538878103 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168538878292 and 168538878301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168538838359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84269439179 + 84269439180.

It is an arithmetic number, because the mean of its divisors is an integer number (84269439180).

Almost surely, 2^168538878359 is an apocalyptic number.

168538878359 is a deficient number, since it is larger than the sum of its proper divisors (1).

168538878359 is an equidigital number, since it uses as much as digits as its factorization.

168538878359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 348364800, while the sum is 71.

The spelling of 168538878359 in words is "one hundred sixty-eight billion, five hundred thirty-eight million, eight hundred seventy-eight thousand, three hundred fifty-nine".