3259891681 has 2 divisors, whose sum is σ = 3259891682. Its totient is φ = 3259891680.

The previous prime is 3259891601. The next prime is 3259891721. The reversal of 3259891681 is 1861989523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2198109456 + 1061782225 = 46884^2 + 32585^2 .

It is a cyclic number.

It is not a de Polignac number, because 3259891681 - 2¹³ = 3259883489 is a prime.

It is a super-2 number, since 2×3259891681² = 21253787543706011522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3259891601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1629945840 + 1629945841.

It is an arithmetic number, because the mean of its divisors is an integer number (1629945841).

Almost surely, 2^3259891681 is an apocalyptic number.

It is an amenable number.

3259891681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3259891681 is an equidigital number, since it uses as much as digits as its factorization.

3259891681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 52.

The square root of 3259891681 is about 57095.4611243311. The cubic root of 3259891681 is about 1482.7492847855.

The spelling of 3259891681 in words is "three billion, two hundred fifty-nine million, eight hundred ninety-one thousand, six hundred eighty-one".