16565010257 has 2 divisors, whose sum is σ = 16565010258. Its totient is φ = 16565010256.

The previous prime is 16565010233. The next prime is 16565010289. The reversal of 16565010257 is 75201056561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10740420496 + 5824589761 = 103636^2 + 76319^2 .

It is a cyclic number.

It is not a de Polignac number, because 16565010257 - 2⁶ = 16565010193 is a prime.

It is a super-3 number, since 3×16565010257³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16565010257.

It is not a weakly prime, because it can be changed into another prime (16565010157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8282505128 + 8282505129.

It is an arithmetic number, because the mean of its divisors is an integer number (8282505129).

Almost surely, 2^16565010257 is an apocalyptic number.

It is an amenable number.

16565010257 is a deficient number, since it is larger than the sum of its proper divisors (1).

16565010257 is an equidigital number, since it uses as much as digits as its factorization.

16565010257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 38.

The spelling of 16565010257 in words is "sixteen billion, five hundred sixty-five million, ten thousand, two hundred fifty-seven".