518509280516 has 12 divisors (see below), whose sum is σ = 924511830732. Its totient is φ = 254363043168.

The previous prime is 518509280507. The next prime is 518509280537. The reversal of 518509280516 is 615082905815.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 158873988100 + 359635292416 = 398590^2 + 599696^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1222899035 + ... + 1222899458.

It is an arithmetic number, because the mean of its divisors is an integer number (77042652561).

Almost surely, 2^518509280516 is an apocalyptic number.

It is an amenable number.

518509280516 is a deficient number, since it is larger than the sum of its proper divisors (406002550216).

518509280516 is a wasteful number, since it uses less digits than its factorization.

518509280516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2445798550 (or 2445798548 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 50.

The spelling of 518509280516 in words is "five hundred eighteen billion, five hundred nine million, two hundred eighty thousand, five hundred sixteen".