16725381637 has 2 divisors, whose sum is σ = 16725381638. Its totient is φ = 16725381636.

The previous prime is 16725381619. The next prime is 16725381653. The reversal of 16725381637 is 73618352761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11038864356 + 5686517281 = 105066^2 + 75409^2 .

It is an emirp because it is prime and its reverse (73618352761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16725381637 - 2¹¹ = 16725379589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16725381697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8362690818 + 8362690819.

It is an arithmetic number, because the mean of its divisors is an integer number (8362690819).

Almost surely, 2^16725381637 is an apocalyptic number.

It is an amenable number.

16725381637 is a deficient number, since it is larger than the sum of its proper divisors (1).

16725381637 is an equidigital number, since it uses as much as digits as its factorization.

16725381637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The spelling of 16725381637 in words is "sixteen billion, seven hundred twenty-five million, three hundred eighty-one thousand, six hundred thirty-seven".