128995305466 has 16 divisors (see below), whose sum is σ = 208418784768. Its totient is φ = 59703296400.

The previous prime is 128995305463. The next prime is 128995305473. The reversal of 128995305466 is 664503599821.

It is a self number, because there is not a number n which added to its sum of digits gives 128995305466.

It is not an unprimeable number, because it can be changed into a prime (128995305463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45228345 + ... + 45231196.

It is an arithmetic number, because the mean of its divisors is an integer number (13026174048).

Almost surely, 2^128995305466 is an apocalyptic number.

128995305466 is a deficient number, since it is larger than the sum of its proper divisors (79423479302).

128995305466 is a wasteful number, since it uses less digits than its factorization.

128995305466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90459597.

The product of its (nonzero) digits is 13996800, while the sum is 58.

The spelling of 128995305466 in words is "one hundred twenty-eight billion, nine hundred ninety-five million, three hundred five thousand, four hundred sixty-six".