33997509909 has 24 divisors (see below), whose sum is σ = 54102263904. Its totient is φ = 20400540000.

The previous prime is 33997509881. The next prime is 33997509911. The reversal of 33997509909 is 90990579933.

33997509909 is a `hidden beast` number, since 3 + 39 + 9 + 7 + 509 + 90 + 9 = 666.

It is not a de Polignac number, because 33997509909 - 2⁷ = 33997509781 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33997509209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1690047 + ... + 1710044.

It is an arithmetic number, because the mean of its divisors is an integer number (2254260996).

Almost surely, 2^33997509909 is an apocalyptic number.

It is an amenable number.

33997509909 is a deficient number, since it is larger than the sum of its proper divisors (20104753995).

33997509909 is a wasteful number, since it uses less digits than its factorization.

33997509909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400209 (or 3400206 counting only the distinct ones).

The product of its (nonzero) digits is 18600435, while the sum is 63.

The spelling of 33997509909 in words is "thirty-three billion, nine hundred ninety-seven million, five hundred nine thousand, nine hundred nine".