128278222090 has 16 divisors (see below), whose sum is σ = 244483200072. Its totient is φ = 48292977664.

The previous prime is 128278221979. The next prime is 128278222091. The reversal of 128278222090 is 90222872821.

128278222090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 90883557961 + 37394664129 = 301469^2 + 193377^2 .

It is not an unprimeable number, because it can be changed into a prime (128278222091) 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, 377288719 + ... + 377289058.

Almost surely, 2^128278222090 is an apocalyptic number.

128278222090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128278222090 is a deficient number, since it is larger than the sum of its proper divisors (116204977982).

128278222090 is a wasteful number, since it uses less digits than its factorization.

128278222090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754577801.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 128278222090 in words is "one hundred twenty-eight billion, two hundred seventy-eight million, two hundred twenty-two thousand, ninety".