542043644447 has 2 divisors, whose sum is σ = 542043644448. Its totient is φ = 542043644446.

The previous prime is 542043644393. The next prime is 542043644489. The reversal of 542043644447 is 744446340245.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 542043644447 - 2⁶ = 542043644383 is a prime.

It is a super-2 number, since 2×542043644447² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542043649447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271021822223 + 271021822224.

It is an arithmetic number, because the mean of its divisors is an integer number (271021822224).

Almost surely, 2^542043644447 is an apocalyptic number.

542043644447 is a deficient number, since it is larger than the sum of its proper divisors (1).

542043644447 is an equidigital number, since it uses as much as digits as its factorization.

542043644447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5160960, while the sum is 47.

The spelling of 542043644447 in words is "five hundred forty-two billion, forty-three million, six hundred forty-four thousand, four hundred forty-seven".