442161515416889 has 2 divisors, whose sum is σ = 442161515416890. Its totient is φ = 442161515416888.

The previous prime is 442161515416883. The next prime is 442161515416921. The reversal of 442161515416889 is 988614515161244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245357512587664 + 196804002829225 = 15663892^2 + 14028685^2 .

It is a cyclic number.

It is not a de Polignac number, because 442161515416889 - 2²⁴ = 442161498639673 is a prime.

It is not a weakly prime, because it can be changed into another prime (442161515416883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221080757708444 + 221080757708445.

It is an arithmetic number, because the mean of its divisors is an integer number (221080757708445).

Almost surely, 2^{442161515416889} is an apocalyptic number.

It is an amenable number.

442161515416889 is a deficient number, since it is larger than the sum of its proper divisors (1).

442161515416889 is an equidigital number, since it uses as much as digits as its factorization.

442161515416889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66355200, while the sum is 65.

The spelling of 442161515416889 in words is "four hundred forty-two trillion, one hundred sixty-one billion, five hundred fifteen million, four hundred sixteen thousand, eight hundred eighty-nine".