641508243 has 8 divisors (see below), whose sum is σ = 905658768. Its totient is φ = 402514944.

The previous prime is 641508227. The next prime is 641508247. The reversal of 641508243 is 342805146.

641508243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 641508243 - 2⁴ = 641508227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641508247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6289246 + ... + 6289347.

It is an arithmetic number, because the mean of its divisors is an integer number (113207346).

Almost surely, 2^641508243 is an apocalyptic number.

641508243 is a deficient number, since it is larger than the sum of its proper divisors (264150525).

641508243 is a wasteful number, since it uses less digits than its factorization.

641508243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12578613.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 641508243 is about 25328.0130093144. The cubic root of 641508243 is about 862.4503055594.

The spelling of 641508243 in words is "six hundred forty-one million, five hundred eight thousand, two hundred forty-three".