8381573658473 has 2 divisors, whose sum is σ = 8381573658474. Its totient is φ = 8381573658472.

The previous prime is 8381573658467. The next prime is 8381573658487. The reversal of 8381573658473 is 3748563751838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5147054138944 + 3234519519529 = 2268712^2 + 1798477^2 .

It is a cyclic number.

It is not a de Polignac number, because 8381573658473 - 2²⁸ = 8381305223017 is a prime.

It is not a weakly prime, because it can be changed into another prime (8381573658443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4190786829236 + 4190786829237.

It is an arithmetic number, because the mean of its divisors is an integer number (4190786829237).

Almost surely, 2^{8381573658473} is an apocalyptic number.

It is an amenable number.

8381573658473 is a deficient number, since it is larger than the sum of its proper divisors (1).

8381573658473 is an equidigital number, since it uses as much as digits as its factorization.

8381573658473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 406425600, while the sum is 68.

The spelling of 8381573658473 in words is "eight trillion, three hundred eighty-one billion, five hundred seventy-three million, six hundred fifty-eight thousand, four hundred seventy-three".