68919500291 has 2 divisors, whose sum is σ = 68919500292. Its totient is φ = 68919500290.

The previous prime is 68919500231. The next prime is 68919500317. The reversal of 68919500291 is 19200591986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68919500291 - 2³⁴ = 51739631107 is a prime.

It is a super-2 number, since 2×68919500291² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68919500201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34459750145 + 34459750146.

It is an arithmetic number, because the mean of its divisors is an integer number (34459750146).

Almost surely, 2^68919500291 is an apocalyptic number.

68919500291 is a deficient number, since it is larger than the sum of its proper divisors (1).

68919500291 is an equidigital number, since it uses as much as digits as its factorization.

68919500291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 50.

The spelling of 68919500291 in words is "sixty-eight billion, nine hundred nineteen million, five hundred thousand, two hundred ninety-one".