128286851868 has 192 divisors, whose sum is σ = 423651916800. Its totient is φ = 32681594880.

The previous prime is 128286851827. The next prime is 128286851929. The reversal of 128286851868 is 868158682821.

It is a super-3 number, since 3×128286851868³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18493 + ... + 506868.

It is an arithmetic number, because the mean of its divisors is an integer number (2206520400).

Almost surely, 2^128286851868 is an apocalyptic number.

128286851868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128286851868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211825958400).

128286851868 is an abundant number, since it is smaller than the sum of its proper divisors (295365064932).

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

128286851868 is a wasteful number, since it uses less digits than its factorization.

128286851868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525417 (or 525409 counting only the distinct ones).

The product of its digits is 23592960, while the sum is 63.

The spelling of 128286851868 in words is "one hundred twenty-eight billion, two hundred eighty-six million, eight hundred fifty-one thousand, eight hundred sixty-eight".