128477277682 has 16 divisors (see below), whose sum is σ = 208768273560. Its totient is φ = 59297203056.

The previous prime is 128477277679. The next prime is 128477277697. The reversal of 128477277682 is 286772774821.

It can be written as a sum of positive squares in 4 ways, for example, as 83338641 + 128393939041 = 9129^2 + 358321^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128477277682.

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, 14615233 + ... + 14624020.

Almost surely, 2^128477277682 is an apocalyptic number.

128477277682 is a deficient number, since it is larger than the sum of its proper divisors (80290995878).

128477277682 is an equidigital number, since it uses as much as digits as its factorization.

128477277682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29239294 (or 29239268 counting only the distinct ones).

The product of its digits is 29503488, while the sum is 61.

The spelling of 128477277682 in words is "one hundred twenty-eight billion, four hundred seventy-seven million, two hundred seventy-seven thousand, six hundred eighty-two".