128720539300 has 36 divisors (see below), whose sum is σ = 279497736000. Its totient is φ = 51456111520.

The previous prime is 128720539273. The next prime is 128720539331. The reversal of 128720539300 is 3935027821.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239800 + ... + 561199.

It is an arithmetic number, because the mean of its divisors is an integer number (7763826000).

Almost surely, 2^128720539300 is an apocalyptic number.

128720539300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128720539300 is an abundant number, since it is smaller than the sum of its proper divisors (150777196700).

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

128720539300 is a wasteful number, since it uses less digits than its factorization.

128720539300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802620 (or 802613 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 128720539300 in words is "one hundred twenty-eight billion, seven hundred twenty million, five hundred thirty-nine thousand, three hundred".