16105865257 has 2 divisors, whose sum is σ = 16105865258. Its totient is φ = 16105865256.

The previous prime is 16105865233. The next prime is 16105865267. The reversal of 16105865257 is 75256850161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16103356201 + 2509056 = 126899^2 + 1584^2 .

It is an emirp because it is prime and its reverse (75256850161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16105865257 - 2¹⁹ = 16105340969 is a prime.

It is not a weakly prime, because it can be changed into another prime (16105865267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8052932628 + 8052932629.

It is an arithmetic number, because the mean of its divisors is an integer number (8052932629).

Almost surely, 2^16105865257 is an apocalyptic number.

It is an amenable number.

16105865257 is a deficient number, since it is larger than the sum of its proper divisors (1).

16105865257 is an equidigital number, since it uses as much as digits as its factorization.

16105865257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504000, while the sum is 46.

The spelling of 16105865257 in words is "sixteen billion, one hundred five million, eight hundred sixty-five thousand, two hundred fifty-seven".