542220817729 has 2 divisors, whose sum is σ = 542220817730. Its totient is φ = 542220817728.

The previous prime is 542220817679. The next prime is 542220817741. The reversal of 542220817729 is 927718022245.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536614851600 + 5605966129 = 732540^2 + 74873^2 .

It is a cyclic number.

It is not a de Polignac number, because 542220817729 - 2¹¹ = 542220815681 is a prime.

It is not a weakly prime, because it can be changed into another prime (542220917729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271110408864 + 271110408865.

It is an arithmetic number, because the mean of its divisors is an integer number (271110408865).

Almost surely, 2^542220817729 is an apocalyptic number.

It is an amenable number.

542220817729 is a deficient number, since it is larger than the sum of its proper divisors (1).

542220817729 is an equidigital number, since it uses as much as digits as its factorization.

542220817729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 542220817729 in words is "five hundred forty-two billion, two hundred twenty million, eight hundred seventeen thousand, seven hundred twenty-nine".