127785664 has 28 divisors (see below), whose sum is σ = 254711200. Its totient is φ = 63606528.

The previous prime is 127785613. The next prime is 127785673. The reversal of 127785664 is 466587721.

It is a happy number.

Its product of digits (564480) is a multiple of the sum of its prime factors (8960).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10297 + ... + 19015.

Almost surely, 2^127785664 is an apocalyptic number.

It is an amenable number.

127785664 is a deficient number, since it is larger than the sum of its proper divisors (126925536).

127785664 is an equidigital number, since it uses as much as digits as its factorization.

127785664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8960 (or 8950 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 127785664 is about 11304.2321278360. The cubic root of 127785664 is about 503.6869644273.

The spelling of 127785664 in words is "one hundred twenty-seven million, seven hundred eighty-five thousand, six hundred sixty-four".