128200780540 has 144 divisors (see below), whose sum is σ = 332153365824. Its totient is φ = 41353804800.

The previous prime is 128200780537. The next prime is 128200780627. The reversal of 128200780540 is 45087002821.

It is a self number, because there is not a number n which added to its sum of digits gives 128200780540.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1328320 + ... + 1421560.

It is an arithmetic number, because the mean of its divisors is an integer number (2306620596).

Almost surely, 2^128200780540 is an apocalyptic number.

128200780540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128200780540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166076682912).

128200780540 is an abundant number, since it is smaller than the sum of its proper divisors (203952585284).

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

128200780540 is a wasteful number, since it uses less digits than its factorization.

128200780540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93348 (or 93339 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The spelling of 128200780540 in words is "one hundred twenty-eight billion, two hundred million, seven hundred eighty thousand, five hundred forty".