641571841 has 8 divisors (see below), whose sum is σ = 686786400. Its totient is φ = 597502080.

The previous prime is 641571809. The next prime is 641571863. The reversal of 641571841 is 148175146.

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 641571841 - 2⁵ = 641571809 is a prime.

It is a super-2 number, since 2×641571841² = 823228854328258562, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 641571841.

It is not an unprimeable number, because it can be changed into a prime (641574841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285040 + ... + 287281.

It is an arithmetic number, because the mean of its divisors is an integer number (85848300).

Almost surely, 2^641571841 is an apocalyptic number.

It is an amenable number.

641571841 is a deficient number, since it is larger than the sum of its proper divisors (45214559).

641571841 is a wasteful number, since it uses less digits than its factorization.

641571841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572399.

The product of its digits is 26880, while the sum is 37.

The square root of 641571841 is about 25329.2684655519. The cubic root of 641571841 is about 862.4788052203.

The spelling of 641571841 in words is "six hundred forty-one million, five hundred seventy-one thousand, eight hundred forty-one".