128579494000 has 40 divisors (see below), whose sum is σ = 310905221328. Its totient is φ = 51431796800.

The previous prime is 128579493971. The next prime is 128579494007. The reversal of 128579494000 is 494975821.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128579494007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32142874 + ... + 32146873.

Almost surely, 2^128579494000 is an apocalyptic number.

128579494000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128579494000 is an abundant number, since it is smaller than the sum of its proper divisors (182325727328).

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

128579494000 is an equidigital number, since it uses as much as digits as its factorization.

128579494000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64289770 (or 64289754 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 128579494000 in words is "one hundred twenty-eight billion, five hundred seventy-nine million, four hundred ninety-four thousand".