42365641663 has 2 divisors, whose sum is σ = 42365641664. Its totient is φ = 42365641662.

The previous prime is 42365641621. The next prime is 42365641687. The reversal of 42365641663 is 36614656324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42365641663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42365641063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21182820831 + 21182820832.

It is an arithmetic number, because the mean of its divisors is an integer number (21182820832).

Almost surely, 2^42365641663 is an apocalyptic number.

42365641663 is a deficient number, since it is larger than the sum of its proper divisors (1).

42365641663 is an equidigital number, since it uses as much as digits as its factorization.

42365641663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 46.

The spelling of 42365641663 in words is "forty-two billion, three hundred sixty-five million, six hundred forty-one thousand, six hundred sixty-three".