641504575 has 12 divisors (see below), whose sum is σ = 796263520. Its totient is φ = 512688960.

The previous prime is 641504533. The next prime is 641504597. The reversal of 641504575 is 575405146.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-641504575 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13627 + ... + 38323.

Almost surely, 2^641504575 is an apocalyptic number.

641504575 is a deficient number, since it is larger than the sum of its proper divisors (154758945).

641504575 is a wasteful number, since it uses less digits than its factorization.

641504575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25746 (or 25741 counting only the distinct ones).

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

The square root of 641504575 is about 25327.9405992670. The cubic root of 641504575 is about 862.4486617906.

The spelling of 641504575 in words is "six hundred forty-one million, five hundred four thousand, five hundred seventy-five".