618118553522 has 6 divisors (see below), whose sum is σ = 927179498079. Its totient is φ = 309058720830.

The previous prime is 618118553519. The next prime is 618118553539. The reversal of 618118553522 is 225355811816.

It can be written as a sum of positive squares in only one way, i.e., 309059276761 + 309059276761 = 555931^2 + 555931^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=555931.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 833897 + ... + 1389827.

Almost surely, 2^618118553522 is an apocalyptic number.

618118553522 is a deficient number, since it is larger than the sum of its proper divisors (309060944557).

618118553522 is an frugal number, since it uses more digits than its factorization.

618118553522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111864 (or 555933 counting only the distinct ones).

The product of its digits is 576000, while the sum is 47.

The spelling of 618118553522 in words is "six hundred eighteen billion, one hundred eighteen million, five hundred fifty-three thousand, five hundred twenty-two".