128448776500 has 96 divisors (see below), whose sum is σ = 309007625472. Its totient is φ = 46254960000.

The previous prime is 128448776473. The next prime is 128448776531. The reversal of 128448776500 is 5677844821.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 453130 + ... + 679870.

It is an arithmetic number, because the mean of its divisors is an integer number (3218829432).

Almost surely, 2^128448776500 is an apocalyptic number.

128448776500 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 128448776500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154503812736).

128448776500 is an abundant number, since it is smaller than the sum of its proper divisors (180558848972).

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

128448776500 is a wasteful number, since it uses less digits than its factorization.

128448776500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226874 (or 226862 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 52.

It can be divided in two parts, 1284 and 48776500, that added together give a palindrome (48777784).

The spelling of 128448776500 in words is "one hundred twenty-eight billion, four hundred forty-eight million, seven hundred seventy-six thousand, five hundred".