641318753 has 8 divisors (see below), whose sum is σ = 649018656. Its totient is φ = 633661600.

The previous prime is 641318737. The next prime is 641318759. The reversal of 641318753 is 357813146.

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

It is a cyclic number.

It is not a de Polignac number, because 641318753 - 2⁴ = 641318737 is a prime.

It is a super-2 number, since 2×641318753² = 822579485898950018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641318759) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 20018 + ... + 41028.

It is an arithmetic number, because the mean of its divisors is an integer number (81127332).

Almost surely, 2^641318753 is an apocalyptic number.

It is an amenable number.

641318753 is a deficient number, since it is larger than the sum of its proper divisors (7699903).

641318753 is a wasteful number, since it uses less digits than its factorization.

641318753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21375.

The product of its digits is 60480, while the sum is 38.

The square root of 641318753 is about 25324.2720132287. The cubic root of 641318753 is about 862.3653797595.

The spelling of 641318753 in words is "six hundred forty-one million, three hundred eighteen thousand, seven hundred fifty-three".