641765467 has 4 divisors (see below), whose sum is σ = 733446256. Its totient is φ = 550084680.

The previous prime is 641765459. The next prime is 641765473. The reversal of 641765467 is 764567146.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 641765467 - 2³ = 641765459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641765477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45840384 + ... + 45840397.

It is an arithmetic number, because the mean of its divisors is an integer number (183361564).

Almost surely, 2^641765467 is an apocalyptic number.

641765467 is a deficient number, since it is larger than the sum of its proper divisors (91680789).

641765467 is an equidigital number, since it uses as much as digits as its factorization.

641765467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91680788.

The product of its digits is 846720, while the sum is 46.

The square root of 641765467 is about 25333.0903562909. The cubic root of 641765467 is about 862.5655616900.

The spelling of 641765467 in words is "six hundred forty-one million, seven hundred sixty-five thousand, four hundred sixty-seven".