542587546668161 has 2 divisors, whose sum is σ = 542587546668162. Its totient is φ = 542587546668160.

The previous prime is 542587546668151. The next prime is 542587546668227. The reversal of 542587546668161 is 161866645785245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474230368402561 + 68357178265600 = 21776831^2 + 8267840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542587546668161 is a prime.

It is a super-2 number, since 2×542587546668161² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (542587546668131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271293773334080 + 271293773334081.

It is an arithmetic number, because the mean of its divisors is an integer number (271293773334081).

Almost surely, 2^{542587546668161} is an apocalyptic number.

It is an amenable number.

542587546668161 is a deficient number, since it is larger than the sum of its proper divisors (1).

542587546668161 is an equidigital number, since it uses as much as digits as its factorization.

542587546668161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432000, while the sum is 74.

The spelling of 542587546668161 in words is "five hundred forty-two trillion, five hundred eighty-seven billion, five hundred forty-six million, six hundred sixty-eight thousand, one hundred sixty-one".