128317688930 has 16 divisors (see below), whose sum is σ = 236605300344. Its totient is φ = 50075195520.

The previous prime is 128317688927. The next prime is 128317689007. The reversal of 128317688930 is 39886713821.

It can be written as a sum of positive squares in 4 ways, for example, as 66549036841 + 61768652089 = 257971^2 + 248533^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156484577 + ... + 156485396.

Almost surely, 2^128317688930 is an apocalyptic number.

128317688930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128317688930 is a deficient number, since it is larger than the sum of its proper divisors (108287611414).

128317688930 is a wasteful number, since it uses less digits than its factorization.

128317688930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312970021.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The spelling of 128317688930 in words is "one hundred twenty-eight billion, three hundred seventeen million, six hundred eighty-eight thousand, nine hundred thirty".