128033329840 has 40 divisors (see below), whose sum is σ = 320575763088. Its totient is φ = 47273844480.

The previous prime is 128033329817. The next prime is 128033329877. The reversal of 128033329840 is 48923330821.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61553446 + ... + 61555525.

Almost surely, 2^128033329840 is an apocalyptic number.

128033329840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128033329840 is an abundant number, since it is smaller than the sum of its proper divisors (192542433248).

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

128033329840 is a wasteful number, since it uses less digits than its factorization.

128033329840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123108997 (or 123108991 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 128033329840 in words is "one hundred twenty-eight billion, thirty-three million, three hundred twenty-nine thousand, eight hundred forty".