2104809033617 has 4 divisors (see below), whose sum is σ = 2106920177076. Its totient is φ = 2102697890160.

The previous prime is 2104809033529. The next prime is 2104809033619. The reversal of 2104809033617 is 7163309084012.

It is a Cunningham number, because it is equal to 1450796²+1.

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 1811780608576 + 293028425041 = 1346024^2 + 541321^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2104809033617 is a prime.

It is a super-2 number, since 2×2104809033617² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104809033619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055570234 + ... + 1055572227.

It is an arithmetic number, because the mean of its divisors is an integer number (526730044269).

Almost surely, 2^{2104809033617} is an apocalyptic number.

It is an amenable number.

2104809033617 is a deficient number, since it is larger than the sum of its proper divisors (2111143459).

2104809033617 is an equidigital number, since it uses as much as digits as its factorization.

2104809033617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111143458.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 2104809033617 in words is "two trillion, one hundred four billion, eight hundred nine million, thirty-three thousand, six hundred seventeen".