68841042864157 has 2 divisors, whose sum is σ = 68841042864158. Its totient is φ = 68841042864156.

The previous prime is 68841042864107. The next prime is 68841042864197. The reversal of 68841042864157 is 75146824014886.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59459968238841 + 9381074625316 = 7711029^2 + 3062854^2 .

It is a cyclic number.

It is not a de Polignac number, because 68841042864157 - 2³⁹ = 68291287050269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68841042864107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34420521432078 + 34420521432079.

It is an arithmetic number, because the mean of its divisors is an integer number (34420521432079).

Almost surely, 2^{68841042864157} is an apocalyptic number.

It is an amenable number.

68841042864157 is a deficient number, since it is larger than the sum of its proper divisors (1).

68841042864157 is an equidigital number, since it uses as much as digits as its factorization.

68841042864157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82575360, while the sum is 64.

The spelling of 68841042864157 in words is "sixty-eight trillion, eight hundred forty-one billion, forty-two million, eight hundred sixty-four thousand, one hundred fifty-seven".