68149550159 has 2 divisors, whose sum is σ = 68149550160. Its totient is φ = 68149550158.

The previous prime is 68149550101. The next prime is 68149550167. The reversal of 68149550159 is 95105594186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68149550159 - 2²⁰ = 68148501583 is a prime.

It is a super-3 number, since 3×68149550159³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 68149550159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68149558159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34074775079 + 34074775080.

It is an arithmetic number, because the mean of its divisors is an integer number (34074775080).

Almost surely, 2^68149550159 is an apocalyptic number.

68149550159 is a deficient number, since it is larger than the sum of its proper divisors (1).

68149550159 is an equidigital number, since it uses as much as digits as its factorization.

68149550159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 68149550159 in words is "sixty-eight billion, one hundred forty-nine million, five hundred fifty thousand, one hundred fifty-nine".