128042740784 has 40 divisors (see below), whose sum is σ = 283831952640. Its totient is φ = 54815704128.

The previous prime is 128042740753. The next prime is 128042740789. The reversal of 128042740784 is 487047240821.

It is not an unprimeable number, because it can be changed into a prime (128042740789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 519074 + ... + 724929.

It is an arithmetic number, because the mean of its divisors is an integer number (7095798816).

Almost surely, 2^128042740784 is an apocalyptic number.

128042740784 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128042740784 is an abundant number, since it is smaller than the sum of its proper divisors (155789211856).

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

128042740784 is a wasteful number, since it uses less digits than its factorization.

128042740784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244937 (or 1244931 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 47.

The spelling of 128042740784 in words is "one hundred twenty-eight billion, forty-two million, seven hundred forty thousand, seven hundred eighty-four".