128523337918 has 16 divisors (see below), whose sum is σ = 195539029344. Its totient is φ = 63344020320.

The previous prime is 128523337903. The next prime is 128523337927. The reversal of 128523337918 is 819733325821.

It is a happy number.

It is a congruent number.

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, 650896 + ... + 825052.

It is an arithmetic number, because the mean of its divisors is an integer number (12221189334).

Almost surely, 2^128523337918 is an apocalyptic number.

128523337918 is a deficient number, since it is larger than the sum of its proper divisors (67015691426).

128523337918 is a wasteful number, since it uses less digits than its factorization.

128523337918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179427.

The product of its digits is 2177280, while the sum is 52.

The spelling of 128523337918 in words is "one hundred twenty-eight billion, five hundred twenty-three million, three hundred thirty-seven thousand, nine hundred eighteen".