54543965935681 has 2 divisors, whose sum is σ = 54543965935682. Its totient is φ = 54543965935680.

The previous prime is 54543965935637. The next prime is 54543965935703. The reversal of 54543965935681 is 18653956934545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51385671824400 + 3158294111281 = 7168380^2 + 1777159^2 .

It is a cyclic number.

It is not a de Polignac number, because 54543965935681 - 2¹⁵ = 54543965902913 is a prime.

It is a super-2 number, since 2×54543965935681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (54543965935601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27271982967840 + 27271982967841.

It is an arithmetic number, because the mean of its divisors is an integer number (27271982967841).

Almost surely, 2^{54543965935681} is an apocalyptic number.

It is an amenable number.

54543965935681 is a deficient number, since it is larger than the sum of its proper divisors (1).

54543965935681 is an equidigital number, since it uses as much as digits as its factorization.

54543965935681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520000, while the sum is 73.

The spelling of 54543965935681 in words is "fifty-four trillion, five hundred forty-three billion, nine hundred sixty-five million, nine hundred thirty-five thousand, six hundred eighty-one".