641718713 has 16 divisors (see below), whose sum is σ = 679166400. Its totient is φ = 605537856.

The previous prime is 641718689. The next prime is 641718739. The reversal of 641718713 is 317817146.

It is a happy number.

It is not a de Polignac number, because 641718713 - 2⁸ = 641718457 is a prime.

It is a super-2 number, since 2×641718713² = 823605813228752738, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641718793) 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 15 ways as a sum of consecutive naturals, for example, 235706 + ... + 238412.

It is an arithmetic number, because the mean of its divisors is an integer number (42447900).

Almost surely, 2^641718713 is an apocalyptic number.

It is an amenable number.

641718713 is a deficient number, since it is larger than the sum of its proper divisors (37447687).

641718713 is a wasteful number, since it uses less digits than its factorization.

641718713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2936.

The product of its digits is 28224, while the sum is 38.

The square root of 641718713 is about 25332.1675543172. The cubic root of 641718713 is about 862.5446145934.

The spelling of 641718713 in words is "six hundred forty-one million, seven hundred eighteen thousand, seven hundred thirteen".