518722337641 has 2 divisors, whose sum is σ = 518722337642. Its totient is φ = 518722337640.

The previous prime is 518722337533. The next prime is 518722337647. The reversal of 518722337641 is 146733227815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395384409616 + 123337928025 = 628796^2 + 351195^2 .

It is a cyclic number.

It is not a de Polignac number, because 518722337641 - 2⁹ = 518722337129 is a prime.

It is not a weakly prime, because it can be changed into another prime (518722337647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259361168820 + 259361168821.

It is an arithmetic number, because the mean of its divisors is an integer number (259361168821).

Almost surely, 2^518722337641 is an apocalyptic number.

It is an amenable number.

518722337641 is a deficient number, since it is larger than the sum of its proper divisors (1).

518722337641 is an equidigital number, since it uses as much as digits as its factorization.

518722337641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 49.

The spelling of 518722337641 in words is "five hundred eighteen billion, seven hundred twenty-two million, three hundred thirty-seven thousand, six hundred forty-one".