128639799360 has 336 divisors, whose sum is σ = 449861098752. Its totient is φ = 33733324800.

The previous prime is 128639799317. The next prime is 128639799361. The reversal of 128639799360 is 63997936821.

128639799360 is a `hidden beast` number, since 128 + 6 + 397 + 99 + 36 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (128639799361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129026382 + ... + 129027378.

Almost surely, 2^128639799360 is an apocalyptic number.

128639799360 is a gapful number since it is divisible by the number (10) 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 128639799360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224930549376).

128639799360 is an abundant number, since it is smaller than the sum of its proper divisors (321221299392).

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

128639799360 is a wasteful number, since it uses less digits than its factorization.

128639799360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722 (or 1709 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 63.

The spelling of 128639799360 in words is "one hundred twenty-eight billion, six hundred thirty-nine million, seven hundred ninety-nine thousand, three hundred sixty".