128778452224 has 36 divisors (see below), whose sum is σ = 272174688324. Its totient is φ = 60601622528.

The previous prime is 128778452213. The next prime is 128778452237. The reversal of 128778452224 is 422254877821.

It can be written as a sum of positive squares in 2 ways, for example, as 65757370624 + 63021081600 = 256432^2 + 251040^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14790967 + ... + 14799670.

It is an arithmetic number, because the mean of its divisors is an integer number (7560408009).

Almost surely, 2^128778452224 is an apocalyptic number.

It is an amenable number.

128778452224 is an abundant number, since it is smaller than the sum of its proper divisors (143396236100).

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

128778452224 is an equidigital number, since it uses as much as digits as its factorization.

128778452224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29590670 (or 29590656 counting only the distinct ones).

The product of its digits is 4014080, while the sum is 52.

The spelling of 128778452224 in words is "one hundred twenty-eight billion, seven hundred seventy-eight million, four hundred fifty-two thousand, two hundred twenty-four".