84444661999 has 2 divisors, whose sum is σ = 84444662000. Its totient is φ = 84444661998.

The previous prime is 84444661997. The next prime is 84444662021. The reversal of 84444661999 is 99916644448.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84444661999 - 2¹ = 84444661997 is a prime.

Together with 84444661997, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 84444661999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84444661997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42222330999 + 42222331000.

It is an arithmetic number, because the mean of its divisors is an integer number (42222331000).

Almost surely, 2^84444661999 is an apocalyptic number.

84444661999 is a deficient number, since it is larger than the sum of its proper divisors (1).

84444661999 is an equidigital number, since it uses as much as digits as its factorization.

84444661999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53747712, while the sum is 64.

The spelling of 84444661999 in words is "eighty-four billion, four hundred forty-four million, six hundred sixty-one thousand, nine hundred ninety-nine".