128218856970 has 32 divisors (see below), whose sum is σ = 307735142400. Its totient is φ = 34190596800.

The previous prime is 128218856963. The next prime is 128218856993. The reversal of 128218856970 is 79658812821.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 128218856970.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1386231 + ... + 1475829.

It is an arithmetic number, because the mean of its divisors is an integer number (9616723200).

Almost surely, 2^128218856970 is an apocalyptic number.

128218856970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128218856970 is an abundant number, since it is smaller than the sum of its proper divisors (179516285430).

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

128218856970 is a wasteful number, since it uses less digits than its factorization.

128218856970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137310.

The product of its (nonzero) digits is 3870720, while the sum is 57.

The spelling of 128218856970 in words is "one hundred twenty-eight billion, two hundred eighteen million, eight hundred fifty-six thousand, nine hundred seventy".