794620818965681 has 2 divisors, whose sum is σ = 794620818965682. Its totient is φ = 794620818965680.

The previous prime is 794620818965657. The next prime is 794620818965707. The reversal of 794620818965681 is 186569818026497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 791755991909281 + 2864827056400 = 28138159^2 + 1692580^2 .

It is a cyclic number.

It is not a de Polignac number, because 794620818965681 - 2³⁴ = 794603639096497 is a prime.

It is a super-2 number, since 2×794620818965681² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 794620818965596 and 794620818965605.

It is not a weakly prime, because it can be changed into another prime (794620818955681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397310409482840 + 397310409482841.

It is an arithmetic number, because the mean of its divisors is an integer number (397310409482841).

Almost surely, 2^{794620818965681} is an apocalyptic number.

It is an amenable number.

794620818965681 is a deficient number, since it is larger than the sum of its proper divisors (1).

794620818965681 is an equidigital number, since it uses as much as digits as its factorization.

794620818965681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2508226560, while the sum is 80.

The spelling of 794620818965681 in words is "seven hundred ninety-four trillion, six hundred twenty billion, eight hundred eighteen million, nine hundred sixty-five thousand, six hundred eighty-one".