2216445638399 has 4 divisors (see below), whose sum is σ = 2216453467464. Its totient is φ = 2216437809336.

The previous prime is 2216445638377. The next prime is 2216445638423. The reversal of 2216445638399 is 9938365446122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2216445638399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216445638359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3473297 + ... + 4061610.

It is an arithmetic number, because the mean of its divisors is an integer number (554113366866).

Almost surely, 2^{2216445638399} is an apocalyptic number.

2216445638399 is a deficient number, since it is larger than the sum of its proper divisors (7829065).

2216445638399 is an equidigital number, since it uses as much as digits as its factorization.

2216445638399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7829064.

The product of its digits is 67184640, while the sum is 62.

The spelling of 2216445638399 in words is "two trillion, two hundred sixteen billion, four hundred forty-five million, six hundred thirty-eight thousand, three hundred ninety-nine".