641424566442 has 64 divisors (see below), whose sum is σ = 1449230745600. Its totient is φ = 187474015680.

The previous prime is 641424566407. The next prime is 641424566459. The reversal of 641424566442 is 244665424146.

It is a super-2 number, since 2×641424566442² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641424566391 and 641424566400.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1677559 + ... + 2024117.

It is an arithmetic number, because the mean of its divisors is an integer number (22644230400).

Almost surely, 2^641424566442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641424566442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724615372800).

641424566442 is an abundant number, since it is smaller than the sum of its proper divisors (807806179158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

641424566442 is a wasteful number, since it uses less digits than its factorization.

641424566442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347571.

The product of its digits is 4423680, while the sum is 48.

The spelling of 641424566442 in words is "six hundred forty-one billion, four hundred twenty-four million, five hundred sixty-six thousand, four hundred forty-two".