128872717882 has 4 divisors (see below), whose sum is σ = 193309076826. Its totient is φ = 64436358940.

The previous prime is 128872717859. The next prime is 128872717889. The reversal of 128872717882 is 288717278821.

128872717882 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 128408272281 + 464445601 = 358341^2 + 21551^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128872717882.

It is not an unprimeable number, because it can be changed into a prime (128872717889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32218179469 + ... + 32218179472.

Almost surely, 2^128872717882 is an apocalyptic number.

128872717882 is a deficient number, since it is larger than the sum of its proper divisors (64436358944).

128872717882 is an equidigital number, since it uses as much as digits as its factorization.

128872717882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64436358943.

The product of its digits is 11239424, while the sum is 61.

The spelling of 128872717882 in words is "one hundred twenty-eight billion, eight hundred seventy-two million, seven hundred seventeen thousand, eight hundred eighty-two".