128727516128 has 24 divisors (see below), whose sum is σ = 253629909288. Its totient is φ = 64313570944.

The previous prime is 128727516083. The next prime is 128727516149. The reversal of 128727516128 is 821615727821.

It is a happy number.

128727516128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×128727516128² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 1526651 + ... + 1608762.

It is an arithmetic number, because the mean of its divisors is an integer number (10567912887).

Almost surely, 2^128727516128 is an apocalyptic number.

It is an amenable number.

128727516128 is a deficient number, since it is larger than the sum of its proper divisors (124902393160).

128727516128 is a wasteful number, since it uses less digits than its factorization.

128727516128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136706 (or 3136698 counting only the distinct ones).

The product of its digits is 752640, while the sum is 50.

The spelling of 128727516128 in words is "one hundred twenty-eight billion, seven hundred twenty-seven million, five hundred sixteen thousand, one hundred twenty-eight".