33640634440 has 96 divisors (see below), whose sum is σ = 91877561280. Its totient is φ = 11032441728.

The previous prime is 33640634431. The next prime is 33640634477. The reversal of 33640634440 is 4443604633.

It is a super-2 number, since 2×33640634440² (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 33640634440.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328042 + ... + 418201.

It is an arithmetic number, because the mean of its divisors is an integer number (957057930).

Almost surely, 2^33640634440 is an apocalyptic number.

It is an amenable number.

33640634440 is an abundant number, since it is smaller than the sum of its proper divisors (58236926840).

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

33640634440 is a wasteful number, since it uses less digits than its factorization.

33640634440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746291 (or 746280 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 37.

The spelling of 33640634440 in words is "thirty-three billion, six hundred forty million, six hundred thirty-four thousand, four hundred forty".