3261677456221 has 4 divisors (see below), whose sum is σ = 3261804430012. Its totient is φ = 3261550482432.

The previous prime is 3261677456197. The next prime is 3261677456239. The reversal of 3261677456221 is 1226547761623.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3020904705625 + 240772750596 = 1738075^2 + 490686^2 .

It is a cyclic number.

It is not a de Polignac number, because 3261677456221 - 2²⁹ = 3261140585309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3261677456251) 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 in 3 ways as a sum of consecutive naturals, for example, 63448356 + ... + 63499741.

It is an arithmetic number, because the mean of its divisors is an integer number (815451107503).

Almost surely, 2^{3261677456221} is an apocalyptic number.

It is an amenable number.

3261677456221 is a deficient number, since it is larger than the sum of its proper divisors (126973791).

3261677456221 is a wasteful number, since it uses less digits than its factorization.

3261677456221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126973790.

The product of its digits is 5080320, while the sum is 52.

The spelling of 3261677456221 in words is "three trillion, two hundred sixty-one billion, six hundred seventy-seven million, four hundred fifty-six thousand, two hundred twenty-one".