542458256866 has 16 divisors (see below), whose sum is σ = 825271663320. Its totient is φ = 267385789440.

The previous prime is 542458256863. The next prime is 542458256891. The reversal of 542458256866 is 668652854245.

It can be written as a sum of positive squares in 4 ways, for example, as 341498815641 + 200959441225 = 584379^2 + 448285^2 .

It is a super-2 number, since 2×542458256866² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (542458256863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4461555 + ... + 4581526.

Almost surely, 2^542458256866 is an apocalyptic number.

542458256866 is a deficient number, since it is larger than the sum of its proper divisors (282813406454).

542458256866 is a wasteful number, since it uses less digits than its factorization.

542458256866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9043509.

The product of its digits is 110592000, while the sum is 61.

The spelling of 542458256866 in words is "five hundred forty-two billion, four hundred fifty-eight million, two hundred fifty-six thousand, eight hundred sixty-six".