33138772856 has 32 divisors (see below), whose sum is σ = 71264400480. Its totient is φ = 14151782400.

The previous prime is 33138772847. The next prime is 33138772867. The reversal of 33138772856 is 65827783133.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 33138772798 and 33138772807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1037225 + ... + 1068696.

It is an arithmetic number, because the mean of its divisors is an integer number (2227012515).

Almost surely, 2^33138772856 is an apocalyptic number.

It is an amenable number.

33138772856 is an abundant number, since it is smaller than the sum of its proper divisors (38125627624).

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

33138772856 is a wasteful number, since it uses less digits than its factorization.

33138772856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106215 (or 2106211 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 53.

The spelling of 33138772856 in words is "thirty-three billion, one hundred thirty-eight million, seven hundred seventy-two thousand, eight hundred fifty-six".