128117880252 has 96 divisors (see below), whose sum is σ = 333346890240. Its totient is φ = 42553330560.

The previous prime is 128117880239. The next prime is 128117880287. The reversal of 128117880252 is 252088711821.

It is a junction number, because it is equal to n+sod(n) for n = 128117880198 and 128117880207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47257177 + ... + 47259887.

It is an arithmetic number, because the mean of its divisors is an integer number (3472363440).

Almost surely, 2^128117880252 is an apocalyptic number.

128117880252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128117880252 is an abundant number, since it is smaller than the sum of its proper divisors (205229009988).

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

128117880252 is a wasteful number, since it uses less digits than its factorization.

128117880252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4128 (or 4120 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 45.

The spelling of 128117880252 in words is "one hundred twenty-eight billion, one hundred seventeen million, eight hundred eighty thousand, two hundred fifty-two".