18162558368 has 12 divisors (see below), whose sum is σ = 35757536850. Its totient is φ = 9081279168.

The previous prime is 18162558367. The next prime is 18162558371. The reversal of 18162558368 is 86385526181.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16541046544 + 1621511824 = 128612^2 + 40268^2 .

It is not an unprimeable number, because it can be changed into a prime (18162558367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 283789943 + ... + 283790006.

Almost surely, 2^18162558368 is an apocalyptic number.

It is an amenable number.

18162558368 is a deficient number, since it is larger than the sum of its proper divisors (17594978482).

18162558368 is an equidigital number, since it uses as much as digits as its factorization.

18162558368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567579959 (or 567579951 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 53.

The spelling of 18162558368 in words is "eighteen billion, one hundred sixty-two million, five hundred fifty-eight thousand, three hundred sixty-eight".