768634163281 has 2 divisors, whose sum is σ = 768634163282. Its totient is φ = 768634163280.

The previous prime is 768634163267. The next prime is 768634163303. The reversal of 768634163281 is 182361436867.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 767822825025 + 811338256 = 876255^2 + 28484^2 .

It is an emirp because it is prime and its reverse (182361436867) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 768634163281 - 2⁷ = 768634163153 is a prime.

It is a super-2 number, since 2×768634163281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (768634163201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 384317081640 + 384317081641.

It is an arithmetic number, because the mean of its divisors is an integer number (384317081641).

Almost surely, 2^768634163281 is an apocalyptic number.

It is an amenable number.

768634163281 is a deficient number, since it is larger than the sum of its proper divisors (1).

768634163281 is an equidigital number, since it uses as much as digits as its factorization.

768634163281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 55.

The spelling of 768634163281 in words is "seven hundred sixty-eight billion, six hundred thirty-four million, one hundred sixty-three thousand, two hundred eighty-one".