68591959867 has 2 divisors, whose sum is σ = 68591959868. Its totient is φ = 68591959866.

The previous prime is 68591959859. The next prime is 68591959949. The reversal of 68591959867 is 76895919586.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68591959867 - 2³ = 68591959859 is a prime.

It is a super-2 number, since 2×68591959867² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68591959867.

It is not a weakly prime, because it can be changed into another prime (68591959817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34295979933 + 34295979934.

It is an arithmetic number, because the mean of its divisors is an integer number (34295979934).

Almost surely, 2^68591959867 is an apocalyptic number.

68591959867 is a deficient number, since it is larger than the sum of its proper divisors (1).

68591959867 is an equidigital number, since it uses as much as digits as its factorization.

68591959867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 293932800, while the sum is 73.

The spelling of 68591959867 in words is "sixty-eight billion, five hundred ninety-one million, nine hundred fifty-nine thousand, eight hundred sixty-seven".