3205554641261 has 16 divisors (see below), whose sum is σ = 3672897728640. Its totient is φ = 2740565741760.

The previous prime is 3205554641251. The next prime is 3205554641273. The reversal of 3205554641261 is 1621464555023.

It is a de Polignac number, because none of the positive numbers 2^k-3205554641261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3205554641221) 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 15 ways as a sum of consecutive naturals, for example, 15655895 + ... + 15859323.

It is an arithmetic number, because the mean of its divisors is an integer number (229556108040).

Almost surely, 2^{3205554641261} is an apocalyptic number.

It is an amenable number.

3205554641261 is a deficient number, since it is larger than the sum of its proper divisors (467343087379).

3205554641261 is a wasteful number, since it uses less digits than its factorization.

3205554641261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209204.

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 3205554641261 in words is "three trillion, two hundred five billion, five hundred fifty-four million, six hundred forty-one thousand, two hundred sixty-one".