33489890544 has 80 divisors (see below), whose sum is σ = 94455740160. Its totient is φ = 10140372480.

The previous prime is 33489890543. The next prime is 33489890563. The reversal of 33489890544 is 44509898433.

It is a super-2 number, since 2×33489890544² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33489890543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 655989 + ... + 705195.

It is an arithmetic number, because the mean of its divisors is an integer number (1180696752).

Almost surely, 2^33489890544 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 33489890544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47227870080).

33489890544 is an abundant number, since it is smaller than the sum of its proper divisors (60965849616).

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

33489890544 is a wasteful number, since it uses less digits than its factorization.

33489890544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50518 (or 50512 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 57.

The spelling of 33489890544 in words is "thirty-three billion, four hundred eighty-nine million, eight hundred ninety thousand, five hundred forty-four".