33505999999 has 4 divisors (see below), whose sum is σ = 34218893664. Its totient is φ = 32793106336.

The previous prime is 33505999997. The next prime is 33506000123. The reversal of 33505999999 is 99999950533.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 33505999999 - 2¹ = 33505999997 is a prime.

It is a super-2 number, since 2×33505999999² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

33505999999 is a modest number, since divided by 999999 gives 33505 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33505999993) 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, 356446762 + ... + 356446855.

It is an arithmetic number, because the mean of its divisors is an integer number (8554723416).

Almost surely, 2^33505999999 is an apocalyptic number.

33505999999 is a deficient number, since it is larger than the sum of its proper divisors (712893665).

33505999999 is an equidigital number, since it uses as much as digits as its factorization.

33505999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712893664.

The product of its (nonzero) digits is 119574225, while the sum is 70.

The spelling of 33505999999 in words is "thirty-three billion, five hundred five million, nine hundred ninety-nine thousand, nine hundred ninety-nine".