128364664 has 8 divisors (see below), whose sum is σ = 240683760. Its totient is φ = 64182328.

The previous prime is 128364631. The next prime is 128364667. The reversal of 128364664 is 466463821.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128364667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8022784 + ... + 8022799.

It is an arithmetic number, because the mean of its divisors is an integer number (30085470).

Almost surely, 2^128364664 is an apocalyptic number.

It is an amenable number.

128364664 is a deficient number, since it is larger than the sum of its proper divisors (112319096).

128364664 is a wasteful number, since it uses less digits than its factorization.

128364664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16045589 (or 16045585 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 128364664 is about 11329.8130611233. The cubic root of 128364664 is about 504.4465576936.

The spelling of 128364664 in words is "one hundred twenty-eight million, three hundred sixty-four thousand, six hundred sixty-four".