128508338922 has 16 divisors (see below), whose sum is σ = 257160364320. Its totient is φ = 42812165232.

The previous prime is 128508338921. The next prime is 128508338927. The reversal of 128508338922 is 229833805821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128508338921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5975308 + ... + 5996775.

It is an arithmetic number, because the mean of its divisors is an integer number (16072522770).

Almost surely, 2^128508338922 is an apocalyptic number.

128508338922 is an abundant number, since it is smaller than the sum of its proper divisors (128652025398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128508338922 is a wasteful number, since it uses less digits than its factorization.

128508338922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11973877.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The spelling of 128508338922 in words is "one hundred twenty-eight billion, five hundred eight million, three hundred thirty-eight thousand, nine hundred twenty-two".