128516664 has 16 divisors (see below), whose sum is σ = 321291720. Its totient is φ = 42838880.

The previous prime is 128516629. The next prime is 128516671. The reversal of 128516664 is 466615821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2677407 + ... + 2677454.

Almost surely, 2^128516664 is an apocalyptic number.

It is an amenable number.

128516664 is an abundant number, since it is smaller than the sum of its proper divisors (192775056).

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

128516664 is a wasteful number, since it uses less digits than its factorization.

128516664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5354870 (or 5354866 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 128516664 is about 11336.5190424574. The cubic root of 128516664 is about 504.6455886669.

The spelling of 128516664 in words is "one hundred twenty-eight million, five hundred sixteen thousand, six hundred sixty-four".