3921609804161 has 8 divisors (see below), whose sum is σ = 4485237694080. Its totient is φ = 3358831393728.

The previous prime is 3921609804131. The next prime is 3921609804181. The reversal of 3921609804161 is 1614089061293.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3921609804161 - 2¹⁸ = 3921609542017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921609804131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212359976 + ... + 212378441.

It is an arithmetic number, because the mean of its divisors is an integer number (560654711760).

Almost surely, 2^{3921609804161} is an apocalyptic number.

It is an amenable number.

3921609804161 is a deficient number, since it is larger than the sum of its proper divisors (563627889919).

3921609804161 is a wasteful number, since it uses less digits than its factorization.

3921609804161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424739743.

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 3921609804161 in words is "three trillion, nine hundred twenty-one billion, six hundred nine million, eight hundred four thousand, one hundred sixty-one".