16442144516725 has 12 divisors (see below), whose sum is σ = 20772943338276. Its totient is φ = 12905532298880.

The previous prime is 16442144516717. The next prime is 16442144516731. The reversal of 16442144516725 is 52761544124461.

It can be written as a sum of positive squares in 6 ways, for example, as 681427136196 + 15760717380529 = 825486^2 + 3969977^2 .

It is not a de Polignac number, because 16442144516725 - 2³ = 16442144516717 is a prime.

It is a super-3 number, since 3×16442144516725³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6204581512 + ... + 6204584161.

It is an arithmetic number, because the mean of its divisors is an integer number (1731078611523).

Almost surely, 2^{16442144516725} is an apocalyptic number.

It is an amenable number.

16442144516725 is a deficient number, since it is larger than the sum of its proper divisors (4330798821551).

16442144516725 is a wasteful number, since it uses less digits than its factorization.

16442144516725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12409165736 (or 12409165731 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 52.

The spelling of 16442144516725 in words is "sixteen trillion, four hundred forty-two billion, one hundred forty-four million, five hundred sixteen thousand, seven hundred twenty-five".