3261521761 has 2 divisors, whose sum is σ = 3261521762. Its totient is φ = 3261521760.

The previous prime is 3261521729. The next prime is 3261521777. The reversal of 3261521761 is 1671251623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2485620736 + 775901025 = 49856^2 + 27855^2 .

It is a cyclic number.

It is not a de Polignac number, because 3261521761 - 2⁵ = 3261521729 is a prime.

It is a super-2 number, since 2×3261521761² = 21275048394953082242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3261521701) 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, 1630760880 + 1630760881.

It is an arithmetic number, because the mean of its divisors is an integer number (1630760881).

Almost surely, 2^3261521761 is an apocalyptic number.

It is an amenable number.

3261521761 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261521761 is an equidigital number, since it uses as much as digits as its factorization.

3261521761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 3261521761 is about 57109.7343804014. The cubic root of 3261521761 is about 1482.9963888241.

The spelling of 3261521761 in words is "three billion, two hundred sixty-one million, five hundred twenty-one thousand, seven hundred sixty-one".