518136811271 has 2 divisors, whose sum is σ = 518136811272. Its totient is φ = 518136811270.

The previous prime is 518136811249. The next prime is 518136811333. The reversal of 518136811271 is 172118631815.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 518136811271 - 2⁶ = 518136811207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518136811471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259068405635 + 259068405636.

It is an arithmetic number, because the mean of its divisors is an integer number (259068405636).

Almost surely, 2^518136811271 is an apocalyptic number.

518136811271 is a deficient number, since it is larger than the sum of its proper divisors (1).

518136811271 is an equidigital number, since it uses as much as digits as its factorization.

518136811271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 44.

The spelling of 518136811271 in words is "five hundred eighteen billion, one hundred thirty-six million, eight hundred eleven thousand, two hundred seventy-one".