33564012672 has 32 divisors (see below), whose sum is σ = 89154409680. Its totient is φ = 11188004096.

The previous prime is 33564012659. The next prime is 33564012673. The reversal of 33564012672 is 27621046533.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×33564012672² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33564012672.

It is not an unprimeable number, because it can be changed into a prime (33564012673) 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, 43702758 + ... + 43703525.

Almost surely, 2^33564012672 is an apocalyptic number.

33564012672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

33564012672 is an abundant number, since it is smaller than the sum of its proper divisors (55590397008).

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

33564012672 is an equidigital number, since it uses as much as digits as its factorization.

33564012672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87406300 (or 87406288 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 33564012672 in words is "thirty-three billion, five hundred sixty-four million, twelve thousand, six hundred seventy-two".