33640306091 has 6 divisors (see below), whose sum is σ = 39132601020. Its totient is φ = 28834548036.

The previous prime is 33640306081. The next prime is 33640306093. The reversal of 33640306091 is 19060304633.

It is not a de Polignac number, because 33640306091 - 2¹⁰ = 33640305067 is a prime.

It is a super-2 number, since 2×33640306091² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33640306093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 343268381 + ... + 343268478.

It is an arithmetic number, because the mean of its divisors is an integer number (6522100170).

Almost surely, 2^33640306091 is an apocalyptic number.

33640306091 is a deficient number, since it is larger than the sum of its proper divisors (5492294929).

33640306091 is an equidigital number, since it uses as much as digits as its factorization.

33640306091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686536873 (or 686536866 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 35.

The spelling of 33640306091 in words is "thirty-three billion, six hundred forty million, three hundred six thousand, ninety-one".