542458256891 has 2 divisors, whose sum is σ = 542458256892. Its totient is φ = 542458256890.

The previous prime is 542458256863. The next prime is 542458256929. The reversal of 542458256891 is 198652854245.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 542458256891 - 2²⁶ = 542391148027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542458256891.

It is not a weakly prime, because it can be changed into another prime (542458256801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271229128445 + 271229128446.

It is an arithmetic number, because the mean of its divisors is an integer number (271229128446).

Almost surely, 2^542458256891 is an apocalyptic number.

542458256891 is a deficient number, since it is larger than the sum of its proper divisors (1).

542458256891 is an equidigital number, since it uses as much as digits as its factorization.

542458256891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648000, while the sum is 59.

The spelling of 542458256891 in words is "five hundred forty-two billion, four hundred fifty-eight million, two hundred fifty-six thousand, eight hundred ninety-one".