8518537868873 has 2 divisors, whose sum is σ = 8518537868874. Its totient is φ = 8518537868872.

The previous prime is 8518537868861. The next prime is 8518537868899. The reversal of 8518537868873 is 3788687358158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8518535334409 + 2534464 = 2918653^2 + 1592^2 .

It is a cyclic number.

It is not a de Polignac number, because 8518537868873 - 2²² = 8518533674569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8518537868794 and 8518537868803.

It is not a weakly prime, because it can be changed into another prime (8518537888873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4259268934436 + 4259268934437.

It is an arithmetic number, because the mean of its divisors is an integer number (4259268934437).

Almost surely, 2^{8518537868873} is an apocalyptic number.

It is an amenable number.

8518537868873 is a deficient number, since it is larger than the sum of its proper divisors (1).

8518537868873 is an equidigital number, since it uses as much as digits as its factorization.

8518537868873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2167603200, while the sum is 77.

The spelling of 8518537868873 in words is "eight trillion, five hundred eighteen billion, five hundred thirty-seven million, eight hundred sixty-eight thousand, eight hundred seventy-three".