16213322738 has 18 divisors (see below), whose sum is σ = 24505327119. Its totient is φ = 8045346172.

The previous prime is 16213322717. The next prime is 16213322747. The reversal of 16213322738 is 83722331261.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8106661369 + 8106661369 = 90037^2 + 90037^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=90037.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 32232995 + ... + 32233497.

Almost surely, 2^16213322738 is an apocalyptic number.

16213322738 is a deficient number, since it is larger than the sum of its proper divisors (8292004381).

16213322738 is an frugal number, since it uses more digits than its factorization.

16213322738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 684 counting only the distinct ones).

The product of its digits is 72576, while the sum is 38.

Adding to 16213322738 its reverse (83722331261), we get a palindrome (99935653999).

The spelling of 16213322738 in words is "sixteen billion, two hundred thirteen million, three hundred twenty-two thousand, seven hundred thirty-eight".