543136732681 has 2 divisors, whose sum is σ = 543136732682. Its totient is φ = 543136732680.

The previous prime is 543136732609. The next prime is 543136732709. The reversal of 543136732681 is 186237631345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373462765456 + 169673967225 = 611116^2 + 411915^2 .

It is a cyclic number.

It is not a de Polignac number, because 543136732681 - 2⁷ = 543136732553 is a prime.

It is a super-2 number, since 2×543136732681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (543136732601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271568366340 + 271568366341.

It is an arithmetic number, because the mean of its divisors is an integer number (271568366341).

Almost surely, 2^543136732681 is an apocalyptic number.

It is an amenable number.

543136732681 is a deficient number, since it is larger than the sum of its proper divisors (1).

543136732681 is an equidigital number, since it uses as much as digits as its factorization.

543136732681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 49.

The spelling of 543136732681 in words is "five hundred forty-three billion, one hundred thirty-six million, seven hundred thirty-two thousand, six hundred eighty-one".