641443718 has 8 divisors (see below), whose sum is σ = 962466960. Its totient is φ = 320621400.

The previous prime is 641443697. The next prime is 641443763. The reversal of 641443718 is 817344146.

It is a happy number.

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

It is a super-2 number, since 2×641443718² = 822900086723327048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41978 + ... + 55181.

It is an arithmetic number, because the mean of its divisors is an integer number (120308370).

Almost surely, 2^641443718 is an apocalyptic number.

641443718 is a deficient number, since it is larger than the sum of its proper divisors (321023242).

641443718 is a wasteful number, since it uses less digits than its factorization.

641443718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100462.

The product of its digits is 64512, while the sum is 38.

The square root of 641443718 is about 25326.7391900339. The cubic root of 641443718 is about 862.4213885645.

The spelling of 641443718 in words is "six hundred forty-one million, four hundred forty-three thousand, seven hundred eighteen".