33904856809 has 4 divisors (see below), whose sum is σ = 34000904916. Its totient is φ = 33808808704.

The previous prime is 33904856779. The next prime is 33904856819. The reversal of 33904856809 is 90865840933.

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 8845966809 + 25058890000 = 94053^2 + 158300^2 .

It is a cyclic number.

It is not a de Polignac number, because 33904856809 - 2¹⁷ = 33904725737 is a prime.

It is a super-2 number, since 2×33904856809² (a number of 22 digits) contains 22 as substring.

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 33904856809.

It is not an unprimeable number, because it can be changed into a prime (33904856819) 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, 48023524 + ... + 48024229.

It is an arithmetic number, because the mean of its divisors is an integer number (8500226229).

Almost surely, 2^33904856809 is an apocalyptic number.

It is an amenable number.

33904856809 is a deficient number, since it is larger than the sum of its proper divisors (96048107).

33904856809 is an equidigital number, since it uses as much as digits as its factorization.

33904856809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96048106.

The product of its (nonzero) digits is 5598720, while the sum is 55.

The spelling of 33904856809 in words is "thirty-three billion, nine hundred four million, eight hundred fifty-six thousand, eight hundred nine".