641582263 has 8 divisors (see below), whose sum is σ = 765116928. Its totient is φ = 526017624.

The previous prime is 641582243. The next prime is 641582267. The reversal of 641582263 is 362285146.

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 641582263 - 2²⁹ = 104711351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641582267) 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, 1992331 + ... + 1992652.

It is an arithmetic number, because the mean of its divisors is an integer number (95639616).

Almost surely, 2^641582263 is an apocalyptic number.

641582263 is a deficient number, since it is larger than the sum of its proper divisors (123534665).

641582263 is a wasteful number, since it uses less digits than its factorization.

641582263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3985013.

The product of its digits is 69120, while the sum is 37.

The square root of 641582263 is about 25329.4741950953. The cubic root of 641582263 is about 862.4834753678.

The spelling of 641582263 in words is "six hundred forty-one million, five hundred eighty-two thousand, two hundred sixty-three".