33989939456 has 72 divisors (see below), whose sum is σ = 74089227744. Its totient is φ = 15434485760.

The previous prime is 33989939453. The next prime is 33989939561. The reversal of 33989939456 is 65493998933.

It is not an unprimeable number, because it can be changed into a prime (33989939453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3083651 + ... + 3094653.

It is an arithmetic number, because the mean of its divisors is an integer number (1029017052).

Almost surely, 2^33989939456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33989939456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37044613872).

33989939456 is an abundant number, since it is smaller than the sum of its proper divisors (40099288288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33989939456 is a wasteful number, since it uses less digits than its factorization.

33989939456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12127 (or 12113 counting only the distinct ones).

The product of its digits is 170061120, while the sum is 68.

The spelling of 33989939456 in words is "thirty-three billion, nine hundred eighty-nine million, nine hundred thirty-nine thousand, four hundred fifty-six".