33455213989 has 4 divisors (see below), whose sum is σ = 34271194860. Its totient is φ = 32639233120.

The previous prime is 33455213977. The next prime is 33455213993. The reversal of 33455213989 is 98931255433.

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

It can be written as a sum of positive squares in 2 ways, for example, as 16086609889 + 17368604100 = 126833^2 + 131790^2 .

It is a cyclic number.

It is not a de Polignac number, because 33455213989 - 2¹¹ = 33455211941 is a prime.

It is a super-2 number, since 2×33455213989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33455213929) 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 3 ways as a sum of consecutive naturals, for example, 407990374 + ... + 407990455.

It is an arithmetic number, because the mean of its divisors is an integer number (8567798715).

Almost surely, 2^33455213989 is an apocalyptic number.

It is an amenable number.

33455213989 is a deficient number, since it is larger than the sum of its proper divisors (815980871).

33455213989 is an equidigital number, since it uses as much as digits as its factorization.

33455213989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815980870.

The product of its digits is 3499200, while the sum is 52.

The spelling of 33455213989 in words is "thirty-three billion, four hundred fifty-five million, two hundred thirteen thousand, nine hundred eighty-nine".