518931013957 has 2 divisors, whose sum is σ = 518931013958. Its totient is φ = 518931013956.

The previous prime is 518931013949. The next prime is 518931013961. The reversal of 518931013957 is 759310139815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463551275716 + 55379738241 = 680846^2 + 235329^2 .

It is a cyclic number.

It is not a de Polignac number, because 518931013957 - 2³ = 518931013949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518931013907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259465506978 + 259465506979.

It is an arithmetic number, because the mean of its divisors is an integer number (259465506979).

Almost surely, 2^518931013957 is an apocalyptic number.

It is an amenable number.

518931013957 is a deficient number, since it is larger than the sum of its proper divisors (1).

518931013957 is an equidigital number, since it uses as much as digits as its factorization.

518931013957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1020600, while the sum is 52.

The spelling of 518931013957 in words is "five hundred eighteen billion, nine hundred thirty-one million, thirteen thousand, nine hundred fifty-seven".