128699683398 has 48 divisors (see below), whose sum is σ = 327599200656. Its totient is φ = 35999910720.

The previous prime is 128699683373. The next prime is 128699683403. The reversal of 128699683398 is 893386996821.

128699683398 is a `hidden beast` number, since 1 + 286 + 9 + 9 + 6 + 8 + 339 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24997365 + ... + 25002512.

It is an arithmetic number, because the mean of its divisors is an integer number (6824983347).

Almost surely, 2^128699683398 is an apocalyptic number.

128699683398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

128699683398 is an abundant number, since it is smaller than the sum of its proper divisors (198899517258).

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

128699683398 is a wasteful number, since it uses less digits than its factorization.

128699683398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49999909 (or 49999906 counting only the distinct ones).

The product of its digits is 241864704, while the sum is 72.

The spelling of 128699683398 in words is "one hundred twenty-eight billion, six hundred ninety-nine million, six hundred eighty-three thousand, three hundred ninety-eight".