128964664 has 8 divisors (see below), whose sum is σ = 241808760. Its totient is φ = 64482328.

The previous prime is 128964637. The next prime is 128964707. The reversal of 128964664 is 466469821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8060284 + ... + 8060299.

It is an arithmetic number, because the mean of its divisors is an integer number (30226095).

Almost surely, 2^128964664 is an apocalyptic number.

It is an amenable number.

128964664 is a deficient number, since it is larger than the sum of its proper divisors (112844096).

128964664 is a wasteful number, since it uses less digits than its factorization.

128964664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16120589 (or 16120585 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The square root of 128964664 is about 11356.2610043975. The cubic root of 128964664 is about 505.2312948916.

The spelling of 128964664 in words is "one hundred twenty-eight million, nine hundred sixty-four thousand, six hundred sixty-four".