641723795 has 8 divisors (see below), whose sum is σ = 773719440. Its totient is φ = 510945120.

The previous prime is 641723791. The next prime is 641723813. The reversal of 641723795 is 597327146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 641723795 - 2² = 641723791 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641723791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 303080 + ... + 305189.

It is an arithmetic number, because the mean of its divisors is an integer number (96714930).

Almost surely, 2^641723795 is an apocalyptic number.

641723795 is a deficient number, since it is larger than the sum of its proper divisors (131995645).

641723795 is a wasteful number, since it uses less digits than its factorization.

641723795 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608485.

The product of its digits is 317520, while the sum is 44.

The square root of 641723795 is about 25332.2678613661. The cubic root of 641723795 is about 862.5468915205.

The spelling of 641723795 in words is "six hundred forty-one million, seven hundred twenty-three thousand, seven hundred ninety-five".