645712525 has 12 divisors (see below), whose sum is σ = 801486400. Its totient is φ = 516052080.

The previous prime is 645712519. The next prime is 645712537. The reversal of 645712525 is 525217546.

It is not a de Polignac number, because 645712525 - 2³ = 645712517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13546 + ... + 38404.

Almost surely, 2^645712525 is an apocalyptic number.

It is an amenable number.

645712525 is a deficient number, since it is larger than the sum of its proper divisors (155773875).

645712525 is a wasteful number, since it uses less digits than its factorization.

645712525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25908 (or 25903 counting only the distinct ones).

The product of its digits is 84000, while the sum is 37.

The square root of 645712525 is about 25410.8741486789. The cubic root of 645712525 is about 864.3302979008.

The spelling of 645712525 in words is "six hundred forty-five million, seven hundred twelve thousand, five hundred twenty-five".