645763425 has 24 divisors (see below), whose sum is σ = 1070764800. Its totient is φ = 343406400.

The previous prime is 645763403. The next prime is 645763453. The reversal of 645763425 is 524367546.

645763425 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 645763425 - 2⁹ = 645762913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13840 + ... + 38510.

It is an arithmetic number, because the mean of its divisors is an integer number (44615200).

Almost surely, 2^645763425 is an apocalyptic number.

It is an amenable number.

645763425 is a deficient number, since it is larger than the sum of its proper divisors (425001375).

645763425 is a wasteful number, since it uses less digits than its factorization.

645763425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25033 (or 25028 counting only the distinct ones).

The product of its digits is 604800, while the sum is 42.

The square root of 645763425 is about 25411.8756686711. The cubic root of 645763425 is about 864.3530083458.

The spelling of 645763425 in words is "six hundred forty-five million, seven hundred sixty-three thousand, four hundred twenty-five".