444216217987 has 2 divisors, whose sum is σ = 444216217988. Its totient is φ = 444216217986.

The previous prime is 444216217967. The next prime is 444216218093. The reversal of 444216217987 is 789712612444.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-444216217987 is a prime.

It is not a weakly prime, because it can be changed into another prime (444216217957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222108108993 + 222108108994.

It is an arithmetic number, because the mean of its divisors is an integer number (222108108994).

Almost surely, 2^444216217987 is an apocalyptic number.

444216217987 is a deficient number, since it is larger than the sum of its proper divisors (1).

444216217987 is an equidigital number, since it uses as much as digits as its factorization.

444216217987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5419008, while the sum is 55.

The spelling of 444216217987 in words is "four hundred forty-four billion, two hundred sixteen million, two hundred seventeen thousand, nine hundred eighty-seven".