646255125 has 64 divisors (see below), whose sum is σ = 1200326400. Its totient is φ = 343094400.

The previous prime is 646255117. The next prime is 646255177. The reversal of 646255125 is 521552646.

646255125 is a `hidden beast` number, since 6 + 4 + 625 + 5 + 1 + 25 = 666.

It is not a de Polignac number, because 646255125 - 2³ = 646255117 is a prime.

Its product of digits (72000) is a multiple of the sum of its prime factors (900).

It is a self number, because there is not a number n which added to its sum of digits gives 646255125.

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 63 ways as a sum of consecutive naturals, for example, 1413897 + ... + 1414353.

It is an arithmetic number, because the mean of its divisors is an integer number (18755100).

Almost surely, 2^646255125 is an apocalyptic number.

It is an amenable number.

646255125 is a deficient number, since it is larger than the sum of its proper divisors (554071275).

646255125 is a wasteful number, since it uses less digits than its factorization.

646255125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 884 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 646255125 is about 25421.5484382836. The cubic root of 646255125 is about 864.5723324998.

The spelling of 646255125 in words is "six hundred forty-six million, two hundred fifty-five thousand, one hundred twenty-five".