128646866252 has 24 divisors (see below), whose sum is σ = 227870916336. Its totient is φ = 63541070528.

The previous prime is 128646866251. The next prime is 128646866261. The reversal of 128646866252 is 252668646821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128646866251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3833498 + ... + 3866910.

It is an arithmetic number, because the mean of its divisors is an integer number (9494621514).

Almost surely, 2^128646866252 is an apocalyptic number.

It is an amenable number.

128646866252 is a deficient number, since it is larger than the sum of its proper divisors (99224050084).

128646866252 is a wasteful number, since it uses less digits than its factorization.

128646866252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45097 (or 45095 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 56.

The spelling of 128646866252 in words is "one hundred twenty-eight billion, six hundred forty-six million, eight hundred sixty-six thousand, two hundred fifty-two".