128959772466 has 16 divisors (see below), whose sum is σ = 294765194304. Its totient is φ = 36845649264.

The previous prime is 128959772453. The next prime is 128959772471. The reversal of 128959772466 is 664277959821.

It is a happy number.

128959772466 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 128959772397 and 128959772406.

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, 1535235345 + ... + 1535235428.

It is an arithmetic number, because the mean of its divisors is an integer number (18422824644).

Almost surely, 2^128959772466 is an apocalyptic number.

128959772466 is an abundant number, since it is smaller than the sum of its proper divisors (165805421838).

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

128959772466 is a wasteful number, since it uses less digits than its factorization.

128959772466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070470785.

The product of its digits is 91445760, while the sum is 66.

The spelling of 128959772466 in words is "one hundred twenty-eight billion, nine hundred fifty-nine million, seven hundred seventy-two thousand, four hundred sixty-six".