33812780128 has 24 divisors (see below), whose sum is σ = 67179641760. Its totient is φ = 16751283840.

The previous prime is 33812780117. The next prime is 33812780167. The reversal of 33812780128 is 82108721833.

It is a super-2 number, since 2×33812780128² (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 3 ways as a sum of consecutive naturals, for example, 4843528 + ... + 4850503.

It is an arithmetic number, because the mean of its divisors is an integer number (2799151740).

Almost surely, 2^33812780128 is an apocalyptic number.

It is an amenable number.

33812780128 is a deficient number, since it is larger than the sum of its proper divisors (33366861632).

33812780128 is a wasteful number, since it uses less digits than its factorization.

33812780128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9694150 (or 9694142 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 33812780128 in words is "thirty-three billion, eight hundred twelve million, seven hundred eighty thousand, one hundred twenty-eight".