64854238198289 has 2 divisors, whose sum is σ = 64854238198290. Its totient is φ = 64854238198288.

The previous prime is 64854238198199. The next prime is 64854238198297. The reversal of 64854238198289 is 98289183245846.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34902337152400 + 29951901045889 = 5907820^2 + 5472833^2 .

It is a cyclic number.

It is not a de Polignac number, because 64854238198289 - 2²⁸ = 64853969762833 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (64854238197289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32427119099144 + 32427119099145.

It is an arithmetic number, because the mean of its divisors is an integer number (32427119099145).

Almost surely, 2^{64854238198289} is an apocalyptic number.

It is an amenable number.

64854238198289 is a deficient number, since it is larger than the sum of its proper divisors (1).

64854238198289 is an equidigital number, since it uses as much as digits as its factorization.

64854238198289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1911029760, while the sum is 77.

The spelling of 64854238198289 in words is "sixty-four trillion, eight hundred fifty-four billion, two hundred thirty-eight million, one hundred ninety-eight thousand, two hundred eighty-nine".