326117663281 has 2 divisors, whose sum is σ = 326117663282. Its totient is φ = 326117663280.

The previous prime is 326117663257. The next prime is 326117663329. The reversal of 326117663281 is 182366711623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323174058256 + 2943605025 = 568484^2 + 54255^2 .

It is a cyclic number.

It is not a de Polignac number, because 326117663281 - 2⁷ = 326117663153 is a prime.

It is a super-2 number, since 2×326117663281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (326117661281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163058831640 + 163058831641.

It is an arithmetic number, because the mean of its divisors is an integer number (163058831641).

Almost surely, 2^326117663281 is an apocalyptic number.

It is an amenable number.

326117663281 is a deficient number, since it is larger than the sum of its proper divisors (1).

326117663281 is an equidigital number, since it uses as much as digits as its factorization.

326117663281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 46.

The spelling of 326117663281 in words is "three hundred twenty-six billion, one hundred seventeen million, six hundred sixty-three thousand, two hundred eighty-one".