128516784189 has 16 divisors (see below), whose sum is σ = 177742669632. Its totient is φ = 82538967168.

The previous prime is 128516784101. The next prime is 128516784239. The reversal of 128516784189 is 981487615821.

It is not a de Polignac number, because 128516784189 - 2¹³ = 128516775997 is a prime.

It is a super-3 number, since 3×128516784189³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128516704189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6814242 + ... + 6833075.

It is an arithmetic number, because the mean of its divisors is an integer number (11108916852).

Almost surely, 2^128516784189 is an apocalyptic number.

It is an amenable number.

128516784189 is a deficient number, since it is larger than the sum of its proper divisors (49225885443).

128516784189 is a wasteful number, since it uses less digits than its factorization.

128516784189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13647436.

The product of its digits is 7741440, while the sum is 60.

The spelling of 128516784189 in words is "one hundred twenty-eight billion, five hundred sixteen million, seven hundred eighty-four thousand, one hundred eighty-nine".