543261636631 has 16 divisors (see below), whose sum is σ = 624290644224. Its totient is φ = 463092525504.

The previous prime is 543261636581. The next prime is 543261636641. The reversal of 543261636631 is 136636162345.

It is not a de Polignac number, because 543261636631 - 2¹⁹ = 543261112343 is a prime.

It is a super-2 number, since 2×543261636631² (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 (543261636641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1147456 + ... + 1550218.

It is an arithmetic number, because the mean of its divisors is an integer number (39018165264).

Almost surely, 2^543261636631 is an apocalyptic number.

543261636631 is a deficient number, since it is larger than the sum of its proper divisors (81029007593).

543261636631 is a wasteful number, since it uses less digits than its factorization.

543261636631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403830.

The product of its digits is 1399680, while the sum is 46.

Adding to 543261636631 its reverse (136636162345), we get a palindrome (679897798976).

The spelling of 543261636631 in words is "five hundred forty-three billion, two hundred sixty-one million, six hundred thirty-six thousand, six hundred thirty-one".