518739780226 has 12 divisors (see below), whose sum is σ = 782162328402. Its totient is φ = 258025967616.

The previous prime is 518739780199. The next prime is 518739780259. The reversal of 518739780226 is 622087937815.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 468451269225 + 50288511001 = 684435^2 + 224251^2 .

It is a super-2 number, since 2×518739780226² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3407071 + ... + 3556066.

Almost surely, 2^518739780226 is an apocalyptic number.

518739780226 is a deficient number, since it is larger than the sum of its proper divisors (263422548176).

518739780226 is an equidigital number, since it uses as much as digits as its factorization.

518739780226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6963525 (or 6963332 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 518739780226 in words is "five hundred eighteen billion, seven hundred thirty-nine million, seven hundred eighty thousand, two hundred twenty-six".