518051007949 has 2 divisors, whose sum is σ = 518051007950. Its totient is φ = 518051007948.

The previous prime is 518051007931. The next prime is 518051007961. The reversal of 518051007949 is 949700150815.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326163205449 + 191887802500 = 571107^2 + 438050^2 .

It is a cyclic number.

It is not a de Polignac number, because 518051007949 - 2⁹ = 518051007437 is a prime.

It is a super-2 number, since 2×518051007949² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (518051007049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 259025503974 + 259025503975.

It is an arithmetic number, because the mean of its divisors is an integer number (259025503975).

Almost surely, 2^518051007949 is an apocalyptic number.

It is an amenable number.

518051007949 is a deficient number, since it is larger than the sum of its proper divisors (1).

518051007949 is an equidigital number, since it uses as much as digits as its factorization.

518051007949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 49.

The spelling of 518051007949 in words is "five hundred eighteen billion, fifty-one million, seven thousand, nine hundred forty-nine".