128138686748 has 12 divisors (see below), whose sum is σ = 227314520160. Its totient is φ = 63191680992.

The previous prime is 128138686721. The next prime is 128138686777. The reversal of 128138686748 is 847686831821.

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, 219415268 + ... + 219415851.

It is an arithmetic number, because the mean of its divisors is an integer number (18942876680).

Almost surely, 2^128138686748 is an apocalyptic number.

It is an amenable number.

128138686748 is a deficient number, since it is larger than the sum of its proper divisors (99175833412).

128138686748 is a wasteful number, since it uses less digits than its factorization.

128138686748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438831196 (or 438831194 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 62.

The spelling of 128138686748 in words is "one hundred twenty-eight billion, one hundred thirty-eight million, six hundred eighty-six thousand, seven hundred forty-eight".