128270785280 has 72 divisors (see below), whose sum is σ = 335180344464. Its totient is φ = 46643916800.

The previous prime is 128270785273. The next prime is 128270785319. The reversal of 128270785280 is 82587072821.

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, 4540991 + ... + 4569150.

It is an arithmetic number, because the mean of its divisors is an integer number (4655282562).

Almost surely, 2^128270785280 is an apocalyptic number.

128270785280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128270785280 is an abundant number, since it is smaller than the sum of its proper divisors (206909559184).

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

128270785280 is an equidigital number, since it uses as much as digits as its factorization.

128270785280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9110173 (or 9110159 counting only the distinct ones).

The product of its (nonzero) digits is 1003520, while the sum is 50.

The spelling of 128270785280 in words is "one hundred twenty-eight billion, two hundred seventy million, seven hundred eighty-five thousand, two hundred eighty".