518149665522 has 24 divisors (see below), whose sum is σ = 1124673173676. Its totient is φ = 172406468256.

The previous prime is 518149665511. The next prime is 518149665557. The reversal of 518149665522 is 225566941815.

518149665522 is a `hidden beast` number, since 5 + 1 + 81 + 4 + 9 + 6 + 6 + 552 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 359147305521 + 159002360001 = 599289^2 + 398751^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25830273 + ... + 25850324.

Almost surely, 2^518149665522 is an apocalyptic number.

518149665522 is an abundant number, since it is smaller than the sum of its proper divisors (606523508154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

518149665522 is a wasteful number, since it uses less digits than its factorization.

518149665522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51681162 (or 51681159 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The spelling of 518149665522 in words is "five hundred eighteen billion, one hundred forty-nine million, six hundred sixty-five thousand, five hundred twenty-two".