128116784388 has 24 divisors (see below), whose sum is σ = 314672804320. Its totient is φ = 40457931840.

The previous prime is 128116784381. The next prime is 128116784399. The reversal of 128116784388 is 883487611821.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (128116784381) 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, 280957633 + ... + 280958088.

Almost surely, 2^128116784388 is an apocalyptic number.

It is an amenable number.

128116784388 is an abundant number, since it is smaller than the sum of its proper divisors (186556019932).

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

128116784388 is a wasteful number, since it uses less digits than its factorization.

128116784388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561915747 (or 561915745 counting only the distinct ones).

The product of its digits is 4128768, while the sum is 57.

The spelling of 128116784388 in words is "one hundred twenty-eight billion, one hundred sixteen million, seven hundred eighty-four thousand, three hundred eighty-eight".