442503536621 has 2 divisors, whose sum is σ = 442503536622. Its totient is φ = 442503536620.

The previous prime is 442503536609. The next prime is 442503536641. The reversal of 442503536621 is 126635305244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304026520996 + 138477015625 = 551386^2 + 372125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442503536621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442503536641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221251768310 + 221251768311.

It is an arithmetic number, because the mean of its divisors is an integer number (221251768311).

Almost surely, 2^442503536621 is an apocalyptic number.

It is an amenable number.

442503536621 is a deficient number, since it is larger than the sum of its proper divisors (1).

442503536621 is an equidigital number, since it uses as much as digits as its factorization.

442503536621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 442503536621 in words is "four hundred forty-two billion, five hundred three million, five hundred thirty-six thousand, six hundred twenty-one".