16215344623 has 16 divisors (see below), whose sum is σ = 17012229120. Its totient is φ = 15436238400.

The previous prime is 16215344611. The next prime is 16215344659. The reversal of 16215344623 is 32644351261.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16215344623 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 (16215344603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1575468 + ... + 1585726.

It is an arithmetic number, because the mean of its divisors is an integer number (1063264320).

Almost surely, 2^16215344623 is an apocalyptic number.

16215344623 is a deficient number, since it is larger than the sum of its proper divisors (796884497).

16215344623 is a wasteful number, since it uses less digits than its factorization.

16215344623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11118.

The product of its digits is 103680, while the sum is 37.

Adding to 16215344623 its reverse (32644351261), we get a palindrome (48859695884).

The spelling of 16215344623 in words is "sixteen billion, two hundred fifteen million, three hundred forty-four thousand, six hundred twenty-three".