84544678805317 has 2 divisors, whose sum is σ = 84544678805318. Its totient is φ = 84544678805316.

The previous prime is 84544678805263. The next prime is 84544678805329. The reversal of 84544678805317 is 71350887644548.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84436967503681 + 107711301636 = 9188959^2 + 328194^2 .

It is a cyclic number.

It is not a de Polignac number, because 84544678805317 - 2³¹ = 84542531321669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84544670805317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42272339402658 + 42272339402659.

It is an arithmetic number, because the mean of its divisors is an integer number (42272339402659).

Almost surely, 2^{84544678805317} is an apocalyptic number.

It is an amenable number.

84544678805317 is a deficient number, since it is larger than the sum of its proper divisors (1).

84544678805317 is an equidigital number, since it uses as much as digits as its factorization.

84544678805317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 722534400, while the sum is 70.

The spelling of 84544678805317 in words is "eighty-four trillion, five hundred forty-four billion, six hundred seventy-eight million, eight hundred five thousand, three hundred seventeen".