3279904553561 has 16 divisors (see below), whose sum is σ = 3465995151360. Its totient is φ = 3097441535760.

The previous prime is 3279904553557. The next prime is 3279904553587. The reversal of 3279904553561 is 1653554099723.

It is not a de Polignac number, because 3279904553561 - 2² = 3279904553557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3279904553561.

It is not an unprimeable number, because it can be changed into a prime (3279904553591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76894106 + ... + 76936748.

It is an arithmetic number, because the mean of its divisors is an integer number (216624696960).

Almost surely, 2^{3279904553561} is an apocalyptic number.

It is an amenable number.

3279904553561 is a deficient number, since it is larger than the sum of its proper divisors (186090597799).

3279904553561 is a wasteful number, since it uses less digits than its factorization.

3279904553561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85076.

The product of its (nonzero) digits is 30618000, while the sum is 59.

The spelling of 3279904553561 in words is "three trillion, two hundred seventy-nine billion, nine hundred four million, five hundred fifty-three thousand, five hundred sixty-one".