641091583 has 8 divisors (see below), whose sum is σ = 700488576. Its totient is φ = 581880600.

The previous prime is 641091547. The next prime is 641091587. The reversal of 641091583 is 385190146.

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 641091583 - 2¹⁷ = 640960511 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 (641091587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39241 + ... + 53122.

It is an arithmetic number, because the mean of its divisors is an integer number (87561072).

Almost surely, 2^641091583 is an apocalyptic number.

641091583 is a deficient number, since it is larger than the sum of its proper divisors (59396993).

641091583 is a wasteful number, since it uses less digits than its factorization.

641091583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93005.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 641091583 is about 25319.7863932538. The cubic root of 641091583 is about 862.2635444511.

The spelling of 641091583 in words is "six hundred forty-one million, ninety-one thousand, five hundred eighty-three".