16344453631 has 4 divisors (see below), whose sum is σ = 17830313064. Its totient is φ = 14858594200.

The previous prime is 16344453617. The next prime is 16344453647. The reversal of 16344453631 is 13635444361.

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

It is a cyclic number.

It is not a de Polignac number, because 16344453631 - 2⁹ = 16344453119 is a prime.

It is a super-2 number, since 2×16344453631² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16344453661) 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, 742929700 + ... + 742929721.

It is an arithmetic number, because the mean of its divisors is an integer number (4457578266).

Almost surely, 2^16344453631 is an apocalyptic number.

16344453631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16344453631 is a deficient number, since it is larger than the sum of its proper divisors (1485859433).

16344453631 is a wasteful number, since it uses less digits than its factorization.

16344453631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485859432.

The product of its digits is 311040, while the sum is 40.

Adding to 16344453631 its reverse (13635444361), we get a palindrome (29979897992).

The spelling of 16344453631 in words is "sixteen billion, three hundred forty-four million, four hundred fifty-three thousand, six hundred thirty-one".