33878604889 has 4 divisors (see below), whose sum is σ = 33886272420. Its totient is φ = 33870937360.

The previous prime is 33878604869. The next prime is 33878604943. The reversal of 33878604889 is 98840687833.

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 30584763225 + 3293841664 = 174885^2 + 57392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33878604889 is a prime.

It is a super-2 number, since 2×33878604889² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33878604889.

It is not an unprimeable number, because it can be changed into a prime (33878604839) 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, 3827134 + ... + 3835975.

It is an arithmetic number, because the mean of its divisors is an integer number (8471568105).

Almost surely, 2^33878604889 is an apocalyptic number.

It is an amenable number.

33878604889 is a deficient number, since it is larger than the sum of its proper divisors (7667531).

33878604889 is an equidigital number, since it uses as much as digits as its factorization.

33878604889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7667530.

The product of its (nonzero) digits is 55738368, while the sum is 64.

The spelling of 33878604889 in words is "thirty-three billion, eight hundred seventy-eight million, six hundred four thousand, eight hundred eighty-nine".