128877948688 has 10 divisors (see below), whose sum is σ = 249701025614. Its totient is φ = 64438974336.

The previous prime is 128877948607. The next prime is 128877948701. The reversal of 128877948688 is 886849778821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 65601552384 + 63276396304 = 256128^2 + 251548^2 .

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 as a sum of consecutive naturals, namely, 4027435881 + ... + 4027435912.

Almost surely, 2^128877948688 is an apocalyptic number.

It is an amenable number.

128877948688 is a deficient number, since it is larger than the sum of its proper divisors (120823076926).

128877948688 is an equidigital number, since it uses as much as digits as its factorization.

128877948688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8054871801 (or 8054871795 counting only the distinct ones).

The product of its digits is 693633024, while the sum is 76.

The spelling of 128877948688 in words is "one hundred twenty-eight billion, eight hundred seventy-seven million, nine hundred forty-eight thousand, six hundred eighty-eight".