18286416257 has 2 divisors, whose sum is σ = 18286416258. Its totient is φ = 18286416256.

The previous prime is 18286416251. The next prime is 18286416277. The reversal of 18286416257 is 75261468281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9302409601 + 8984006656 = 96449^2 + 94784^2 .

It is a cyclic number.

It is not a de Polignac number, because 18286416257 - 2⁶ = 18286416193 is a prime.

It is not a weakly prime, because it can be changed into another prime (18286416251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9143208128 + 9143208129.

It is an arithmetic number, because the mean of its divisors is an integer number (9143208129).

Almost surely, 2^18286416257 is an apocalyptic number.

It is an amenable number.

18286416257 is a deficient number, since it is larger than the sum of its proper divisors (1).

18286416257 is an equidigital number, since it uses as much as digits as its factorization.

18286416257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1290240, while the sum is 50.

The spelling of 18286416257 in words is "eighteen billion, two hundred eighty-six million, four hundred sixteen thousand, two hundred fifty-seven".