33111999980 has 12 divisors (see below), whose sum is σ = 69535200000. Its totient is φ = 13244799984.

The previous prime is 33111999971. The next prime is 33112000013. The reversal of 33111999980 is 8999911133.

It is a happy 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, 827799980 + ... + 827800019.

It is an arithmetic number, because the mean of its divisors is an integer number (5794600000).

Almost surely, 2^33111999980 is an apocalyptic number.

It is an amenable number.

33111999980 is an abundant number, since it is smaller than the sum of its proper divisors (36423200020).

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

33111999980 is a wasteful number, since it uses less digits than its factorization.

33111999980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655600008 (or 1655600006 counting only the distinct ones).

The product of its (nonzero) digits is 472392, while the sum is 53.

The spelling of 33111999980 in words is "thirty-three billion, one hundred eleven million, nine hundred ninety-nine thousand, nine hundred eighty".