542458256865 has 32 divisors (see below), whose sum is σ = 991976544000. Its totient is φ = 247967698944.

The previous prime is 542458256863. The next prime is 542458256891. The reversal of 542458256865 is 568652854245.

It is not a de Polignac number, because 542458256865 - 2¹ = 542458256863 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542458256799 and 542458256808.

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 an upside-down number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1998577 + ... + 2253713.

It is an arithmetic number, because the mean of its divisors is an integer number (30999267000).

Almost surely, 2^542458256865 is an apocalyptic number.

542458256865 is the 425229-th octagonal number.

It is an amenable number.

542458256865 is a deficient number, since it is larger than the sum of its proper divisors (449518287135).

542458256865 is a wasteful number, since it uses less digits than its factorization.

542458256865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275401.

The product of its digits is 92160000, while the sum is 60.

The spelling of 542458256865 in words is "five hundred forty-two billion, four hundred fifty-eight million, two hundred fifty-six thousand, eight hundred sixty-five".