33989939455 has 4 divisors (see below), whose sum is σ = 40787927352. Its totient is φ = 27191951560.

The previous prime is 33989939453. The next prime is 33989939561. The reversal of 33989939455 is 55493998933.

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

It is not a de Polignac number, because 33989939455 - 2¹ = 33989939453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33989939453) 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, 3398993941 + ... + 3398993950.

It is an arithmetic number, because the mean of its divisors is an integer number (10196981838).

Almost surely, 2^33989939455 is an apocalyptic number.

33989939455 is a deficient number, since it is larger than the sum of its proper divisors (6797987897).

33989939455 is an equidigital number, since it uses as much as digits as its factorization.

33989939455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6797987896.

The product of its digits is 141717600, while the sum is 67.

The spelling of 33989939455 in words is "thirty-three billion, nine hundred eighty-nine million, nine hundred thirty-nine thousand, four hundred fifty-five".