918313618 has 4 divisors (see below), whose sum is σ = 1377470430. Its totient is φ = 459156808.

The previous prime is 918313609. The next prime is 918313621. The reversal of 918313618 is 816313819.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 816313819 = 4703 ⋅173573.

It can be written as a sum of positive squares in only one way, i.e., 668894769 + 249418849 = 25863^2 + 15793^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 229578403 + ... + 229578406.

Almost surely, 2^918313618 is an apocalyptic number.

918313618 is a deficient number, since it is larger than the sum of its proper divisors (459156812).

918313618 is a wasteful number, since it uses less digits than its factorization.

918313618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459156811.

The product of its digits is 31104, while the sum is 40.

The square root of 918313618 is about 30303.6898413378. The cubic root of 918313618 is about 971.9942032260.

It can be divided in two parts, 9183 and 13618, that added together give a square (22801 = 151²).

The spelling of 918313618 in words is "nine hundred eighteen million, three hundred thirteen thousand, six hundred eighteen".