854457717649 has 2 divisors, whose sum is σ = 854457717650. Its totient is φ = 854457717648.

The previous prime is 854457717601. The next prime is 854457717667. The reversal of 854457717649 is 946717754458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 662115827025 + 192341890624 = 813705^2 + 438568^2 .

It is a cyclic number.

It is not a de Polignac number, because 854457717649 - 2⁹ = 854457717137 is a prime.

It is not a weakly prime, because it can be changed into another prime (854457717689) 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, 427228858824 + 427228858825.

It is an arithmetic number, because the mean of its divisors is an integer number (427228858825).

Almost surely, 2^854457717649 is an apocalyptic number.

It is an amenable number.

854457717649 is a deficient number, since it is larger than the sum of its proper divisors (1).

854457717649 is an equidigital number, since it uses as much as digits as its factorization.

854457717649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 237081600, while the sum is 67.

The spelling of 854457717649 in words is "eight hundred fifty-four billion, four hundred fifty-seven million, seven hundred seventeen thousand, six hundred forty-nine".