128664649612 has 12 divisors (see below), whose sum is σ = 225219161776. Its totient is φ = 64316317680.

The previous prime is 128664649609. The next prime is 128664649637. The reversal of 128664649612 is 216946466821.

It is a happy number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3983688 + ... + 4015855.

Almost surely, 2^128664649612 is an apocalyptic number.

It is an amenable number.

128664649612 is a deficient number, since it is larger than the sum of its proper divisors (96554512164).

128664649612 is a wasteful number, since it uses less digits than its factorization.

128664649612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8003568 (or 8003566 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The spelling of 128664649612 in words is "one hundred twenty-eight billion, six hundred sixty-four million, six hundred forty-nine thousand, six hundred twelve".