33494391168 has 256 divisors, whose sum is σ = 108168307200. Its totient is φ = 8964440064.

The previous prime is 33494391143. The next prime is 33494391169. The reversal of 33494391168 is 86119349433.

It is a super-2 number, since 2×33494391168² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 33494391168.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33494391169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10371378 + ... + 10374606.

It is an arithmetic number, because the mean of its divisors is an integer number (422532450).

Almost surely, 2^33494391168 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 33494391168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54084153600).

33494391168 is an abundant number, since it is smaller than the sum of its proper divisors (74673916032).

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

33494391168 is a wasteful number, since it uses less digits than its factorization.

33494391168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3497 (or 3485 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 51.

The spelling of 33494391168 in words is "thirty-three billion, four hundred ninety-four million, three hundred ninety-one thousand, one hundred sixty-eight".