33940309191 has 16 divisors (see below), whose sum is σ = 47226865920. Its totient is φ = 21640544640.

The previous prime is 33940309177. The next prime is 33940309199. The reversal of 33940309191 is 19190304933.

It is not a de Polignac number, because 33940309191 - 2⁹ = 33940308679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33940309199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 688320 + ... + 735978.

It is an arithmetic number, because the mean of its divisors is an integer number (2951679120).

Almost surely, 2^33940309191 is an apocalyptic number.

33940309191 is a deficient number, since it is larger than the sum of its proper divisors (13286556729).

33940309191 is a wasteful number, since it uses less digits than its factorization.

33940309191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58006.

The product of its (nonzero) digits is 78732, while the sum is 42.

The spelling of 33940309191 in words is "thirty-three billion, nine hundred forty million, three hundred nine thousand, one hundred ninety-one".