128875128840 has 128 divisors (see below), whose sum is σ = 444397104000. Its totient is φ = 33181634304.

The previous prime is 128875128839. The next prime is 128875128841. The reversal of 128875128840 is 48821578821.

It is a happy number.

128875128840 is a `hidden beast` number, since 1 + 2 + 8 + 8 + 7 + 512 + 88 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (128875128839) and next prime (128875128841).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (128875128841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2026074 + ... + 2088713.

It is an arithmetic number, because the mean of its divisors is an integer number (3471852375).

Almost surely, 2^128875128840 is an apocalyptic number.

128875128840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128875128840 is an abundant number, since it is smaller than the sum of its proper divisors (315521975160).

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

128875128840 is a wasteful number, since it uses less digits than its factorization.

128875128840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4114836 (or 4114826 counting only the distinct ones).

The product of its (nonzero) digits is 2293760, while the sum is 54.

The spelling of 128875128840 in words is "one hundred twenty-eight billion, eight hundred seventy-five million, one hundred twenty-eight thousand, eight hundred forty".