518749934291 has 2 divisors, whose sum is σ = 518749934292. Its totient is φ = 518749934290.

The previous prime is 518749934251. The next prime is 518749934309. The reversal of 518749934291 is 192439947815.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-518749934291 is a prime.

It is not a weakly prime, because it can be changed into another prime (518749934201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259374967145 + 259374967146.

It is an arithmetic number, because the mean of its divisors is an integer number (259374967146).

Almost surely, 2^518749934291 is an apocalyptic number.

518749934291 is a deficient number, since it is larger than the sum of its proper divisors (1).

518749934291 is an equidigital number, since it uses as much as digits as its factorization.

518749934291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19595520, while the sum is 62.

The spelling of 518749934291 in words is "five hundred eighteen billion, seven hundred forty-nine million, nine hundred thirty-four thousand, two hundred ninety-one".