128136798484 has 12 divisors (see below), whose sum is σ = 224254494324. Its totient is φ = 64064085824.

The previous prime is 128136798481. The next prime is 128136798533. The reversal of 128136798484 is 484897631821.

It can be written as a sum of positive squares in 2 ways, for example, as 48765005584 + 79371792900 = 220828^2 + 281730^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128136798481) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1011049 + ... + 1130704.

It is an arithmetic number, because the mean of its divisors is an integer number (18687874527).

Almost surely, 2^128136798484 is an apocalyptic number.

It is an amenable number.

128136798484 is a deficient number, since it is larger than the sum of its proper divisors (96117695840).

128136798484 is a wasteful number, since it uses less digits than its factorization.

128136798484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156714 (or 2156712 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 61.

The spelling of 128136798484 in words is "one hundred twenty-eight billion, one hundred thirty-six million, seven hundred ninety-eight thousand, four hundred eighty-four".