33531264064 has 56 divisors (see below), whose sum is σ = 67570502400. Its totient is φ = 16507223040.

The previous prime is 33531264047. The next prime is 33531264071. The reversal of 33531264064 is 46046213533.

It is a super-2 number, since 2×33531264064² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1349029 + ... + 1373659.

Almost surely, 2^33531264064 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 33531264064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33785251200).

33531264064 is an abundant number, since it is smaller than the sum of its proper divisors (34039238336).

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

33531264064 is a wasteful number, since it uses less digits than its factorization.

33531264064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24971 (or 24961 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 33531264064 its reverse (46046213533), we get a palindrome (79577477597).

The spelling of 33531264064 in words is "thirty-three billion, five hundred thirty-one million, two hundred sixty-four thousand, sixty-four".