128783814812 has 12 divisors (see below), whose sum is σ = 225374703120. Its totient is φ = 64391042496.

The previous prime is 128783814799. The next prime is 128783814827. The reversal of 128783814812 is 218418387821.

It is a congruent number.

It is an unprimeable number.

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, 213833 + ... + 550719.

It is an arithmetic number, because the mean of its divisors is an integer number (18781225260).

Almost surely, 2^128783814812 is an apocalyptic number.

It is an amenable number.

128783814812 is a deficient number, since it is larger than the sum of its proper divisors (96590888308).

128783814812 is a wasteful number, since it uses less digits than its factorization.

128783814812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432460 (or 432458 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 53.

The spelling of 128783814812 in words is "one hundred twenty-eight billion, seven hundred eighty-three million, eight hundred fourteen thousand, eight hundred twelve".