8518620811 has 2 divisors, whose sum is σ = 8518620812. Its totient is φ = 8518620810.

The previous prime is 8518620769. The next prime is 8518620821. The reversal of 8518620811 is 1180268158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8518620811 - 2¹⁷ = 8518489739 is a prime.

It is not a weakly prime, because it can be changed into another prime (8518620821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4259310405 + 4259310406.

It is an arithmetic number, because the mean of its divisors is an integer number (4259310406).

Almost surely, 2^8518620811 is an apocalyptic number.

8518620811 is a deficient number, since it is larger than the sum of its proper divisors (1).

8518620811 is an equidigital number, since it uses as much as digits as its factorization.

8518620811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30720, while the sum is 40.

The square root of 8518620811 is about 92296.3748529703. The cubic root of 8518620811 is about 2042.3167332259.

Adding to 8518620811 its reverse (1180268158), we get a palindrome (9698888969).

The spelling of 8518620811 in words is "eight billion, five hundred eighteen million, six hundred twenty thousand, eight hundred eleven".