442640810023 has 2 divisors, whose sum is σ = 442640810024. Its totient is φ = 442640810022.

The previous prime is 442640809993. The next prime is 442640810071. The reversal of 442640810023 is 320018046244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442640810023 - 2⁵ = 442640809991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442640810323) 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 as a sum of consecutive naturals, namely, 221320405011 + 221320405012.

It is an arithmetic number, because the mean of its divisors is an integer number (221320405012).

Almost surely, 2^442640810023 is an apocalyptic number.

442640810023 is a deficient number, since it is larger than the sum of its proper divisors (1).

442640810023 is an equidigital number, since it uses as much as digits as its factorization.

442640810023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36864, while the sum is 34.

Adding to 442640810023 its reverse (320018046244), we get a palindrome (762658856267).

The spelling of 442640810023 in words is "four hundred forty-two billion, six hundred forty million, eight hundred ten thousand, twenty-three".