216444635044447 has 2 divisors, whose sum is σ = 216444635044448. Its totient is φ = 216444635044446.

The previous prime is 216444635044439. The next prime is 216444635044523. The reversal of 216444635044447 is 744440536444612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216444635044447 - 2³ = 216444635044439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216444635044391 and 216444635044400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216444635044427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108222317522223 + 108222317522224.

It is an arithmetic number, because the mean of its divisors is an integer number (108222317522224).

Almost surely, 2^{216444635044447} is an apocalyptic number.

216444635044447 is a deficient number, since it is larger than the sum of its proper divisors (1).

216444635044447 is an equidigital number, since it uses as much as digits as its factorization.

216444635044447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123863040, while the sum is 58.

The spelling of 216444635044447 in words is "two hundred sixteen trillion, four hundred forty-four billion, six hundred thirty-five million, forty-four thousand, four hundred forty-seven".