128361324778 has 32 divisors (see below), whose sum is σ = 198454950144. Its totient is φ = 62222478912.

The previous prime is 128361324761. The next prime is 128361324803. The reversal of 128361324778 is 877423163821.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38395375 + ... + 38398717.

It is an arithmetic number, because the mean of its divisors is an integer number (6201717192).

Almost surely, 2^128361324778 is an apocalyptic number.

128361324778 is a deficient number, since it is larger than the sum of its proper divisors (70093625366).

128361324778 is a wasteful number, since it uses less digits than its factorization.

128361324778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5086.

The product of its digits is 2709504, while the sum is 52.

The spelling of 128361324778 in words is "one hundred twenty-eight billion, three hundred sixty-one million, three hundred twenty-four thousand, seven hundred seventy-eight".