128711164220 has 24 divisors (see below), whose sum is σ = 270311092800. Its totient is φ = 51481104192.

The previous prime is 128711164193. The next prime is 128711164289. The reversal of 128711164220 is 22461117821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116246 + ... + 520514.

It is an arithmetic number, because the mean of its divisors is an integer number (11262962200).

Almost surely, 2^128711164220 is an apocalyptic number.

128711164220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128711164220 is an abundant number, since it is smaller than the sum of its proper divisors (141599928580).

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

128711164220 is a wasteful number, since it uses less digits than its factorization.

128711164220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420197 (or 420195 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The spelling of 128711164220 in words is "one hundred twenty-eight billion, seven hundred eleven million, one hundred sixty-four thousand, two hundred twenty".