128200420086 has 16 divisors (see below), whose sum is σ = 256437350400. Its totient is φ = 42727388328.

The previous prime is 128200420081. The next prime is 128200420133. The reversal of 128200420086 is 680024002821.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128200420081) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1475506 + ... + 1559973.

It is an arithmetic number, because the mean of its divisors is an integer number (16027334400).

Almost surely, 2^128200420086 is an apocalyptic number.

128200420086 is an abundant number, since it is smaller than the sum of its proper divisors (128236930314).

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

128200420086 is a wasteful number, since it uses less digits than its factorization.

128200420086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3042523.

The product of its (nonzero) digits is 12288, while the sum is 33.

The spelling of 128200420086 in words is "one hundred twenty-eight billion, two hundred million, four hundred twenty thousand, eighty-six".