16344440325 has 18 divisors (see below), whose sum is σ = 29274709074. Its totient is φ = 8717034720.

The previous prime is 16344440317. The next prime is 16344440363. The reversal of 16344440325 is 52304444361.

16344440325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 940403556 + 15404036769 = 30666^2 + 124113^2 .

It is not a de Polignac number, because 16344440325 - 2³ = 16344440317 is a prime.

It is a super-2 number, since 2×16344440325² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16344440325.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36320754 + ... + 36321203.

Almost surely, 2^16344440325 is an apocalyptic number.

16344440325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16344440325 is a deficient number, since it is larger than the sum of its proper divisors (12930268749).

16344440325 is a wasteful number, since it uses less digits than its factorization.

16344440325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72641973 (or 72641965 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

Adding to 16344440325 its reverse (52304444361), we get a palindrome (68648884686).

The spelling of 16344440325 in words is "sixteen billion, three hundred forty-four million, four hundred forty thousand, three hundred twenty-five".