641424566441 has 16 divisors (see below), whose sum is σ = 662348105856. Its totient is φ = 620695570176.

The previous prime is 641424566407. The next prime is 641424566459. The reversal of 641424566441 is 144665424146.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641424566441 is a prime.

It is a super-2 number, since 2×641424566441² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641424566401) 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 15 ways as a sum of consecutive naturals, for example, 8166740 + ... + 8244906.

It is an arithmetic number, because the mean of its divisors is an integer number (41396756616).

Almost surely, 2^641424566441 is an apocalyptic number.

It is an amenable number.

641424566441 is a deficient number, since it is larger than the sum of its proper divisors (20923539415).

641424566441 is a wasteful number, since it uses less digits than its factorization.

641424566441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79408.

The product of its digits is 2211840, while the sum is 47.

The spelling of 641424566441 in words is "six hundred forty-one billion, four hundred twenty-four million, five hundred sixty-six thousand, four hundred forty-one".