128139567120 has 120 divisors (see below), whose sum is σ = 430444003392. Its totient is φ = 34161926400.

The previous prime is 128139567109. The next prime is 128139567163. The reversal of 128139567120 is 21765931821.

128139567120 is a `hidden beast` number, since 1 + 2 + 81 + 3 + 9 + 567 + 1 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 3141255 + ... + 3181785.

Almost surely, 2^128139567120 is an apocalyptic number.

128139567120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128139567120 is an abundant number, since it is smaller than the sum of its proper divisors (302304436272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128139567120 is a wasteful number, since it uses less digits than its factorization.

128139567120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44941 (or 44932 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 128139567120 in words is "one hundred twenty-eight billion, one hundred thirty-nine million, five hundred sixty-seven thousand, one hundred twenty".