16126731637 has 2 divisors, whose sum is σ = 16126731638. Its totient is φ = 16126731636.

The previous prime is 16126731617. The next prime is 16126731671. The reversal of 16126731637 is 73613762161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12015228996 + 4111502641 = 109614^2 + 64121^2 .

It is an emirp because it is prime and its reverse (73613762161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16126731637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16126731593 and 16126731602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16126731617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8063365818 + 8063365819.

It is an arithmetic number, because the mean of its divisors is an integer number (8063365819).

Almost surely, 2^16126731637 is an apocalyptic number.

It is an amenable number.

16126731637 is a deficient number, since it is larger than the sum of its proper divisors (1).

16126731637 is an equidigital number, since it uses as much as digits as its factorization.

16126731637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 43.

The spelling of 16126731637 in words is "sixteen billion, one hundred twenty-six million, seven hundred thirty-one thousand, six hundred thirty-seven".