2104079909909 has 4 divisors (see below), whose sum is σ = 2106165223020. Its totient is φ = 2101994596800.

The previous prime is 2104079909881. The next prime is 2104079909917. The reversal of 2104079909909 is 9099099704012.

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 758196855025 + 1345883054884 = 870745^2 + 1160122^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104079909909 - 2²⁴ = 2104063132693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104079909959) 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, 1042655042 + ... + 1042657059.

It is an arithmetic number, because the mean of its divisors is an integer number (526541305755).

Almost surely, 2^{2104079909909} is an apocalyptic number.

It is an amenable number.

2104079909909 is a deficient number, since it is larger than the sum of its proper divisors (2085313111).

2104079909909 is a wasteful number, since it uses less digits than its factorization.

2104079909909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085313110.

The product of its (nonzero) digits is 3306744, while the sum is 59.

The spelling of 2104079909909 in words is "two trillion, one hundred four billion, seventy-nine million, nine hundred nine thousand, nine hundred nine".