128308672804 has 81 divisors (see below), whose sum is σ = 254597152593. Its totient is φ = 56550066144.

The previous prime is 128308672769. The next prime is 128308672837. The reversal of 128308672804 is 408276803821.

The square root of 128308672804 is 358202.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18980572900 + 109328099904 = 137770^2 + 330648^2 .

It is a Duffinian 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 26 ways as a sum of consecutive naturals, for example, 214204497 + ... + 214205095.

Almost surely, 2^128308672804 is an apocalyptic number.

128308672804 is the 358202-nd square number.

It is an amenable number.

128308672804 is a deficient number, since it is larger than the sum of its proper divisors (126288479789).

128308672804 is an equidigital number, since it uses as much as digits as its factorization.

128308672804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

Multiplying 128308672804 by its sum of digits (49), we get a square (6287124967396 = 2507414²).

The spelling of 128308672804 in words is "one hundred twenty-eight billion, three hundred eight million, six hundred seventy-two thousand, eight hundred four".