442440144191819 has 2 divisors, whose sum is σ = 442440144191820. Its totient is φ = 442440144191818.

The previous prime is 442440144191813. The next prime is 442440144191827. The reversal of 442440144191819 is 918191441044244.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 442440144191819 - 2⁴⁰ = 441340632564043 is a prime.

It is a super-2 number, since 2×442440144191819² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442440144191813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221220072095909 + 221220072095910.

It is an arithmetic number, because the mean of its divisors is an integer number (221220072095910).

Almost surely, 2^{442440144191819} is an apocalyptic number.

442440144191819 is a deficient number, since it is larger than the sum of its proper divisors (1).

442440144191819 is an equidigital number, since it uses as much as digits as its factorization.

442440144191819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5308416, while the sum is 56.

The spelling of 442440144191819 in words is "four hundred forty-two trillion, four hundred forty billion, one hundred forty-four million, one hundred ninety-one thousand, eight hundred nineteen".