646289125 has 16 divisors (see below), whose sum is σ = 816791040. Its totient is φ = 510478800.

The previous prime is 646289113. The next prime is 646289129. The reversal of 646289125 is 521982646.

646289125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646289125 - 2¹⁷ = 646158053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646289129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22849 + ... + 42598.

It is an arithmetic number, because the mean of its divisors is an integer number (51049440).

Almost surely, 2^646289125 is an apocalyptic number.

It is an amenable number.

646289125 is a deficient number, since it is larger than the sum of its proper divisors (170501915).

646289125 is an equidigital number, since it uses as much as digits as its factorization.

646289125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65541 (or 65531 counting only the distinct ones).

The product of its digits is 207360, while the sum is 43.

The square root of 646289125 is about 25422.2171535057. The cubic root of 646289125 is about 864.5874941817.

The spelling of 646289125 in words is "six hundred forty-six million, two hundred eighty-nine thousand, one hundred twenty-five".