645825125 has 16 divisors (see below), whose sum is σ = 879263424. Its totient is φ = 469690000.

The previous prime is 645825097. The next prime is 645825161. The reversal of 645825125 is 521528546.

645825125 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 645825125 - 2²⁸ = 377389669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 233471 + ... + 236220.

It is an arithmetic number, because the mean of its divisors is an integer number (54953964).

Almost surely, 2^645825125 is an apocalyptic number.

It is an amenable number.

645825125 is a deficient number, since it is larger than the sum of its proper divisors (233438299).

645825125 is a wasteful number, since it uses less digits than its factorization.

645825125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469717 (or 469707 counting only the distinct ones).

The product of its digits is 96000, while the sum is 38.

The square root of 645825125 is about 25413.0896390030. The cubic root of 645825125 is about 864.3805359098.

The spelling of 645825125 in words is "six hundred forty-five million, eight hundred twenty-five thousand, one hundred twenty-five".