16939856537 has 2 divisors, whose sum is σ = 16939856538. Its totient is φ = 16939856536.

The previous prime is 16939856491. The next prime is 16939856603. The reversal of 16939856537 is 73565893961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12245414281 + 4694442256 = 110659^2 + 68516^2 .

It is a cyclic number.

It is not a de Polignac number, because 16939856537 - 2²⁰ = 16938807961 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16939856537.

It is not a weakly prime, because it can be changed into another prime (16939850537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8469928268 + 8469928269.

It is an arithmetic number, because the mean of its divisors is an integer number (8469928269).

Almost surely, 2^16939856537 is an apocalyptic number.

It is an amenable number.

16939856537 is a deficient number, since it is larger than the sum of its proper divisors (1).

16939856537 is an equidigital number, since it uses as much as digits as its factorization.

16939856537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36741600, while the sum is 62.

The spelling of 16939856537 in words is "sixteen billion, nine hundred thirty-nine million, eight hundred fifty-six thousand, five hundred thirty-seven".