542236503661 has 2 divisors, whose sum is σ = 542236503662. Its totient is φ = 542236503660.

The previous prime is 542236503619. The next prime is 542236503709. The reversal of 542236503661 is 166305632245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485690517225 + 56545986436 = 696915^2 + 237794^2 .

It is a cyclic number.

It is not a de Polignac number, because 542236503661 - 2¹¹ = 542236501613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542236503761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271118251830 + 271118251831.

It is an arithmetic number, because the mean of its divisors is an integer number (271118251831).

Almost surely, 2^542236503661 is an apocalyptic number.

It is an amenable number.

542236503661 is a deficient number, since it is larger than the sum of its proper divisors (1).

542236503661 is an equidigital number, since it uses as much as digits as its factorization.

542236503661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 542236503661 in words is "five hundred forty-two billion, two hundred thirty-six million, five hundred three thousand, six hundred sixty-one".