542559981877 has 2 divisors, whose sum is σ = 542559981878. Its totient is φ = 542559981876.

The previous prime is 542559981857. The next prime is 542559981961. The reversal of 542559981877 is 778189955245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418627116196 + 123932865681 = 647014^2 + 352041^2 .

It is a cyclic number.

It is not a de Polignac number, because 542559981877 - 2¹⁵ = 542559949109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542559981857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271279990938 + 271279990939.

It is an arithmetic number, because the mean of its divisors is an integer number (271279990939).

Almost surely, 2^542559981877 is an apocalyptic number.

It is an amenable number.

542559981877 is a deficient number, since it is larger than the sum of its proper divisors (1).

542559981877 is an equidigital number, since it uses as much as digits as its factorization.

542559981877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016000, while the sum is 70.

The spelling of 542559981877 in words is "five hundred forty-two billion, five hundred fifty-nine million, nine hundred eighty-one thousand, eight hundred seventy-seven".