18298657908457 has 2 divisors, whose sum is σ = 18298657908458. Its totient is φ = 18298657908456.

The previous prime is 18298657908367. The next prime is 18298657908481. The reversal of 18298657908457 is 75480975689281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11815299400921 + 6483358507536 = 3437339^2 + 2546244^2 .

It is a cyclic number.

It is not a de Polignac number, because 18298657908457 - 2¹¹ = 18298657906409 is a prime.

It is not a weakly prime, because it can be changed into another prime (18298657908757) 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, 9149328954228 + 9149328954229.

It is an arithmetic number, because the mean of its divisors is an integer number (9149328954229).

Almost surely, 2^{18298657908457} is an apocalyptic number.

It is an amenable number.

18298657908457 is a deficient number, since it is larger than the sum of its proper divisors (1).

18298657908457 is an equidigital number, since it uses as much as digits as its factorization.

18298657908457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2438553600, while the sum is 79.

The spelling of 18298657908457 in words is "eighteen trillion, two hundred ninety-eight billion, six hundred fifty-seven million, nine hundred eight thousand, four hundred fifty-seven".