128947816674 has 80 divisors (see below), whose sum is σ = 296422384896. Its totient is φ = 41882508000.

The previous prime is 128947816663. The next prime is 128947816687. The reversal of 128947816674 is 476618749821.

128947816674 is a `hidden beast` number, since 1 + 2 + 89 + 478 + 16 + 6 + 74 = 666.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 996399 + ... + 1118349.

Almost surely, 2^128947816674 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128947816674, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148211192448).

128947816674 is an abundant number, since it is smaller than the sum of its proper divisors (167474568222).

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

128947816674 is a wasteful number, since it uses less digits than its factorization.

128947816674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122133 (or 122124 counting only the distinct ones).

The product of its digits is 32514048, while the sum is 63.

The spelling of 128947816674 in words is "one hundred twenty-eight billion, nine hundred forty-seven million, eight hundred sixteen thousand, six hundred seventy-four".