128113939784 has 16 divisors (see below), whose sum is σ = 252856460400. Its totient is φ = 60685550352.

The previous prime is 128113939783. The next prime is 128113939801. The reversal of 128113939784 is 487939311821.

It is not an unprimeable number, because it can be changed into a prime (128113939783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421427282 + ... + 421427585.

It is an arithmetic number, because the mean of its divisors is an integer number (15803528775).

Almost surely, 2^128113939784 is an apocalyptic number.

It is an amenable number.

128113939784 is a deficient number, since it is larger than the sum of its proper divisors (124742520616).

128113939784 is a wasteful number, since it uses less digits than its factorization.

128113939784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842854892 (or 842854888 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 56.

The spelling of 128113939784 in words is "one hundred twenty-eight billion, one hundred thirteen million, nine hundred thirty-nine thousand, seven hundred eighty-four".