3261104663261 has 2 divisors, whose sum is σ = 3261104663262. Its totient is φ = 3261104663260.

The previous prime is 3261104663143. The next prime is 3261104663263. The reversal of 3261104663261 is 1623664011623.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2494614919225 + 766489744036 = 1579435^2 + 875494^2 .

It is an emirp because it is prime and its reverse (1623664011623) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3261104663261 - 2²² = 3261100468957 is a prime.

Together with 3261104663263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3261104663263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1630552331630 + 1630552331631.

It is an arithmetic number, because the mean of its divisors is an integer number (1630552331631).

Almost surely, 2^{3261104663261} is an apocalyptic number.

It is an amenable number.

3261104663261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3261104663261 is an equidigital number, since it uses as much as digits as its factorization.

3261104663261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 41.

Adding to 3261104663261 its reverse (1623664011623), we get a palindrome (4884768674884).

The spelling of 3261104663261 in words is "three trillion, two hundred sixty-one billion, one hundred four million, six hundred sixty-three thousand, two hundred sixty-one".