128664649608 has 64 divisors (see below), whose sum is σ = 362223083520. Its totient is φ = 37731566400.

The previous prime is 128664649601. The next prime is 128664649609. The reversal of 128664649608 is 806946466821.

It is not an unprimeable number, because it can be changed into a prime (128664649601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7852560 + ... + 7868927.

It is an arithmetic number, because the mean of its divisors is an integer number (5659735680).

Almost surely, 2^128664649608 is an apocalyptic number.

It is an amenable number.

128664649608 is an abundant number, since it is smaller than the sum of its proper divisors (233558433912).

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

128664649608 is a wasteful number, since it uses less digits than its factorization.

128664649608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15721538 (or 15721534 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 60.

The spelling of 128664649608 in words is "one hundred twenty-eight billion, six hundred sixty-four million, six hundred forty-nine thousand, six hundred eight".