33563420664 has 64 divisors (see below), whose sum is σ = 86116206240. Its totient is φ = 10896537600.

The previous prime is 33563420641. The next prime is 33563420741. The reversal of 33563420664 is 46602436533.

It is a super-2 number, since 2×33563420664² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77964 + ... + 270564.

Almost surely, 2^33563420664 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 33563420664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43058103120).

33563420664 is an abundant number, since it is smaller than the sum of its proper divisors (52552785576).

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

33563420664 is a wasteful number, since it uses less digits than its factorization.

33563420664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192800 (or 192796 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 42.

The spelling of 33563420664 in words is "thirty-three billion, five hundred sixty-three million, four hundred twenty thousand, six hundred sixty-four".