518913556322 has 18 divisors (see below), whose sum is σ = 905463648747. Its totient is φ = 222388467924.

The previous prime is 518913556243. The next prime is 518913556363. The reversal of 518913556322 is 223655319815.

It can be written as a sum of positive squares in only one way, i.e., 259456778161 + 259456778161 = 509369^2 + 509369^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=509369.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7094783 + ... + 7167549.

Almost surely, 2^518913556322 is an apocalyptic number.

518913556322 is a deficient number, since it is larger than the sum of its proper divisors (386550092425).

518913556322 is an frugal number, since it uses more digits than its factorization.

518913556322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145550 (or 72776 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 50.

Multiplying 518913556322 by its sum of digits (50), we get a square (25945677816100 = 5093690²).

The spelling of 518913556322 in words is "five hundred eighteen billion, nine hundred thirteen million, five hundred fifty-six thousand, three hundred twenty-two".