442487616481 has 2 divisors, whose sum is σ = 442487616482. Its totient is φ = 442487616480.

The previous prime is 442487616479. The next prime is 442487616523. The reversal of 442487616481 is 184616784244.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442246280256 + 241336225 = 665016^2 + 15535^2 .

It is a cyclic number.

It is not a de Polignac number, because 442487616481 - 2¹ = 442487616479 is a prime.

It is a super-2 number, since 2×442487616481² (a number of 24 digits) contains 22 as substring.

Together with 442487616479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (442487616421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221243808240 + 221243808241.

It is an arithmetic number, because the mean of its divisors is an integer number (221243808241).

Almost surely, 2^442487616481 is an apocalyptic number.

It is an amenable number.

442487616481 is a deficient number, since it is larger than the sum of its proper divisors (1).

442487616481 is an equidigital number, since it uses as much as digits as its factorization.

442487616481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8257536, while the sum is 55.

The spelling of 442487616481 in words is "four hundred forty-two billion, four hundred eighty-seven million, six hundred sixteen thousand, four hundred eighty-one".