642324248563 has 2 divisors, whose sum is σ = 642324248564. Its totient is φ = 642324248562.

The previous prime is 642324248539. The next prime is 642324248591. The reversal of 642324248563 is 365842423246.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 642324248563 - 2²¹ = 642322151411 is a prime.

It is not a weakly prime, because it can be changed into another prime (642324248663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321162124281 + 321162124282.

It is an arithmetic number, because the mean of its divisors is an integer number (321162124282).

Almost surely, 2^642324248563 is an apocalyptic number.

642324248563 is a deficient number, since it is larger than the sum of its proper divisors (1).

642324248563 is an equidigital number, since it uses as much as digits as its factorization.

642324248563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6635520, while the sum is 49.

The spelling of 642324248563 in words is "six hundred forty-two billion, three hundred twenty-four million, two hundred forty-eight thousand, five hundred sixty-three".