542043644489 has 2 divisors, whose sum is σ = 542043644490. Its totient is φ = 542043644488.

The previous prime is 542043644447. The next prime is 542043644491. The reversal of 542043644489 is 984446340245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 542041975225 + 1669264 = 736235^2 + 1292^2 .

It is a cyclic number.

It is not a de Polignac number, because 542043644489 - 2³⁶ = 473324167753 is a prime.

It is a super-2 number, since 2×542043644489² (a number of 24 digits) contains 22 as substring.

Together with 542043644491, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542043644489.

It is not a weakly prime, because it can be changed into another prime (542043643489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271021822244 + 271021822245.

It is an arithmetic number, because the mean of its divisors is an integer number (271021822245).

Almost surely, 2^542043644489 is an apocalyptic number.

It is an amenable number.

542043644489 is a deficient number, since it is larger than the sum of its proper divisors (1).

542043644489 is an equidigital number, since it uses as much as digits as its factorization.

542043644489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13271040, while the sum is 53.

The spelling of 542043644489 in words is "five hundred forty-two billion, forty-three million, six hundred forty-four thousand, four hundred eighty-nine".