33531441328 has 80 divisors (see below), whose sum is σ = 81147734784. Its totient is φ = 13040052480.

The previous prime is 33531441283. The next prime is 33531441329. The reversal of 33531441328 is 82314413533.

It is a super-2 number, since 2×33531441328² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33531441329) 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, 649026 + ... + 698782.

Almost surely, 2^33531441328 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 33531441328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40573867392).

33531441328 is an abundant number, since it is smaller than the sum of its proper divisors (47616293456).

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

33531441328 is a wasteful number, since it uses less digits than its factorization.

33531441328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50330 (or 50324 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The spelling of 33531441328 in words is "thirty-three billion, five hundred thirty-one million, four hundred forty-one thousand, three hundred twenty-eight".