128199664 has 10 divisors (see below), whose sum is σ = 248386880. Its totient is φ = 64099824.

The previous prime is 128199653. The next prime is 128199679. The reversal of 128199664 is 466991821.

It is a happy number.

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, 4006224 + ... + 4006255.

It is an arithmetic number, because the mean of its divisors is an integer number (24838688).

Almost surely, 2^128199664 is an apocalyptic number.

It is an amenable number.

128199664 is a deficient number, since it is larger than the sum of its proper divisors (120187216).

128199664 is an equidigital number, since it uses as much as digits as its factorization.

128199664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8012487 (or 8012481 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 128199664 is about 11322.5290461098. The cubic root of 128199664 is about 504.2303264044.

The spelling of 128199664 in words is "one hundred twenty-eight million, one hundred ninety-nine thousand, six hundred sixty-four".