3280985969581 has 2 divisors, whose sum is σ = 3280985969582. Its totient is φ = 3280985969580.

The previous prime is 3280985969563. The next prime is 3280985969617. The reversal of 3280985969581 is 1859695890823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3218615402500 + 62370567081 = 1794050^2 + 249741^2 .

It is a cyclic number.

It is not a de Polignac number, because 3280985969581 - 2⁵ = 3280985969549 is a prime.

It is a super-2 number, since 2×3280985969581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3280985969081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640492984790 + 1640492984791.

It is an arithmetic number, because the mean of its divisors is an integer number (1640492984791).

Almost surely, 2^{3280985969581} is an apocalyptic number.

It is an amenable number.

3280985969581 is a deficient number, since it is larger than the sum of its proper divisors (1).

3280985969581 is an equidigital number, since it uses as much as digits as its factorization.

3280985969581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 335923200, while the sum is 73.

The spelling of 3280985969581 in words is "three trillion, two hundred eighty billion, nine hundred eighty-five million, nine hundred sixty-nine thousand, five hundred eighty-one".