641703565 has 16 divisors (see below), whose sum is σ = 829449216. Its totient is φ = 475200000.

The previous prime is 641703553. The next prime is 641703581. The reversal of 641703565 is 565307146.

It is not a de Polignac number, because 641703565 - 2⁹ = 641703053 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, 86436 + ... + 93565.

It is an arithmetic number, because the mean of its divisors is an integer number (51840576).

Almost surely, 2^641703565 is an apocalyptic number.

It is an amenable number.

641703565 is a deficient number, since it is larger than the sum of its proper divisors (187745651).

641703565 is a wasteful number, since it uses less digits than its factorization.

641703565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180060.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 641703565 is about 25331.8685651098. The cubic root of 641703565 is about 862.5378276485.

The spelling of 641703565 in words is "six hundred forty-one million, seven hundred three thousand, five hundred sixty-five".