128381383136 has 24 divisors (see below), whose sum is σ = 252794196144. Its totient is φ = 64179682560.

The previous prime is 128381383087. The next prime is 128381383159. The reversal of 128381383136 is 631383183821.

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, 152900 + ... + 529283.

It is an arithmetic number, because the mean of its divisors is an integer number (10533091506).

Almost surely, 2^128381383136 is an apocalyptic number.

128381383136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128381383136 is a deficient number, since it is larger than the sum of its proper divisors (124412813008).

128381383136 is an equidigital number, since it uses as much as digits as its factorization.

128381383136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688074 (or 688066 counting only the distinct ones).

The product of its digits is 497664, while the sum is 47.

The spelling of 128381383136 in words is "one hundred twenty-eight billion, three hundred eighty-one million, three hundred eighty-three thousand, one hundred thirty-six".