128331786242 has 16 divisors (see below), whose sum is σ = 210013424352. Its totient is φ = 58328197920.

The previous prime is 128331786211. The next prime is 128331786257. The reversal of 128331786242 is 242687133821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83873 + ... + 513515.

It is an arithmetic number, because the mean of its divisors is an integer number (13125839022).

Almost surely, 2^128331786242 is an apocalyptic number.

128331786242 is a deficient number, since it is larger than the sum of its proper divisors (81681638110).

128331786242 is a wasteful number, since it uses less digits than its factorization.

128331786242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443233.

The product of its digits is 774144, while the sum is 47.

The spelling of 128331786242 in words is "one hundred twenty-eight billion, three hundred thirty-one million, seven hundred eighty-six thousand, two hundred forty-two".