517104813818 has 4 divisors (see below), whose sum is σ = 775657220730. Its totient is φ = 258552406908.

The previous prime is 517104813817. The next prime is 517104813829. The reversal of 517104813818 is 818318401715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 499123881169 + 17980932649 = 706487^2 + 134093^2 .

It is not an unprimeable number, because it can be changed into a prime (517104813817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129276203453 + ... + 129276203456.

Almost surely, 2^517104813818 is an apocalyptic number.

517104813818 is a deficient number, since it is larger than the sum of its proper divisors (258552406912).

517104813818 is a wasteful number, since it uses less digits than its factorization.

517104813818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258552406911.

The product of its (nonzero) digits is 215040, while the sum is 47.

The spelling of 517104813818 in words is "five hundred seventeen billion, one hundred four million, eight hundred thirteen thousand, eight hundred eighteen".