128378848018 has 16 divisors (see below), whose sum is σ = 193713030720. Its totient is φ = 63807959376.

The previous prime is 128378848007. The next prime is 128378848021. The reversal of 128378848018 is 810848873821.

It is a super-2 number, since 2×128378848018² (a number of 23 digits) contains 22 as substring.

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, 2362963 + ... + 2416681.

It is an arithmetic number, because the mean of its divisors is an integer number (12107064420).

Almost surely, 2^128378848018 is an apocalyptic number.

128378848018 is a deficient number, since it is larger than the sum of its proper divisors (65334182702).

128378848018 is a wasteful number, since it uses less digits than its factorization.

128378848018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60801.

The product of its (nonzero) digits is 5505024, while the sum is 58.

The spelling of 128378848018 in words is "one hundred twenty-eight billion, three hundred seventy-eight million, eight hundred forty-eight thousand, eighteen".