641366223453 has 24 divisors (see below), whose sum is σ = 983383954488. Its totient is φ = 401412160512.

The previous prime is 641366223439. The next prime is 641366223469. The reversal of 641366223453 is 354322663146.

641366223453 is a `hidden beast` number, since 6 + 4 + 1 + 366 + 2 + 234 + 53 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 89498500569 + 551867722884 = 299163^2 + 742878^2 .

It is not a de Polignac number, because 641366223453 - 2⁶ = 641366223389 is a prime.

It is a super-2 number, since 2×641366223453² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641366223399 and 641366223408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641366223413) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5218776 + ... + 5340257.

It is an arithmetic number, because the mean of its divisors is an integer number (40974331437).

Almost surely, 2^641366223453 is an apocalyptic number.

It is an amenable number.

641366223453 is a deficient number, since it is larger than the sum of its proper divisors (342017731035).

641366223453 is a wasteful number, since it uses less digits than its factorization.

641366223453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10559453 (or 10559450 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 45.

Adding to 641366223453 its reverse (354322663146), we get a palindrome (995688886599).

The spelling of 641366223453 in words is "six hundred forty-one billion, three hundred sixty-six million, two hundred twenty-three thousand, four hundred fifty-three".