641426210053 has 4 divisors (see below), whose sum is σ = 643922032140. Its totient is φ = 638930387968.

The previous prime is 641426210011. The next prime is 641426210059. The reversal of 641426210053 is 350012624146.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 609450332929 + 31975877124 = 780673^2 + 178818^2 .

It is a cyclic number.

It is not a de Polignac number, because 641426210053 - 2²⁹ = 640889339141 is a prime.

It is a super-2 number, since 2×641426210053² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641426210059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1247910658 + ... + 1247911171.

It is an arithmetic number, because the mean of its divisors is an integer number (160980508035).

Almost surely, 2^641426210053 is an apocalyptic number.

It is an amenable number.

641426210053 is a deficient number, since it is larger than the sum of its proper divisors (2495822087).

641426210053 is a wasteful number, since it uses less digits than its factorization.

641426210053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495822086.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 641426210053 its reverse (350012624146), we get a palindrome (991438834199).

The spelling of 641426210053 in words is "six hundred forty-one billion, four hundred twenty-six million, two hundred ten thousand, fifty-three".