3261038881 has 2 divisors, whose sum is σ = 3261038882. Its totient is φ = 3261038880.

The previous prime is 3261038861. The next prime is 3261038887. The reversal of 3261038881 is 1888301623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2939374656 + 321664225 = 54216^2 + 17935^2 .

It is a cyclic number.

It is not a de Polignac number, because 3261038881 - 2²⁹ = 2724167969 is a prime.

It is a super-2 number, since 2×3261038881² = 21268749166787464322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3261038887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630519440 + 1630519441.

It is an arithmetic number, because the mean of its divisors is an integer number (1630519441).

Almost surely, 2^3261038881 is an apocalyptic number.

It is an amenable number.

3261038881 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261038881 is an equidigital number, since it uses as much as digits as its factorization.

3261038881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 3261038881 is about 57105.5065733595. The cubic root of 3261038881 is about 1482.9231975664.

The spelling of 3261038881 in words is "three billion, two hundred sixty-one million, thirty-eight thousand, eight hundred eighty-one".