128498656272 has 80 divisors (see below), whose sum is σ = 389630454912. Its totient is φ = 35721630720.

The previous prime is 128498656267. The next prime is 128498656283. The reversal of 128498656272 is 272656894821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5155629 + ... + 5180492.

Almost surely, 2^128498656272 is an apocalyptic number.

128498656272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128498656272 is an abundant number, since it is smaller than the sum of its proper divisors (261131798640).

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

128498656272 is a wasteful number, since it uses less digits than its factorization.

128498656272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10336176 (or 10336170 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 60.

The spelling of 128498656272 in words is "one hundred twenty-eight billion, four hundred ninety-eight million, six hundred fifty-six thousand, two hundred seventy-two".