1618643118 has 16 divisors (see below), whose sum is σ = 3244980816. Its totient is φ = 538265280.

The previous prime is 1618643099. The next prime is 1618643119. The reversal of 1618643118 is 8113468161.

It is a super-5 number, since 5×1618643118⁵ (a number of 47 digits) contains 55555 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1618643119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317871 + ... + 322922.

It is an arithmetic number, because the mean of its divisors is an integer number (202811301).

Almost surely, 2^1618643118 is an apocalyptic number.

1618643118 is an abundant number, since it is smaller than the sum of its proper divisors (1626337698).

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

1618643118 is a wasteful number, since it uses less digits than its factorization.

1618643118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641219.

The product of its digits is 27648, while the sum is 39.

The square root of 1618643118 is about 40232.3640617849. The cubic root of 1618643118 is about 1174.1322986959.

The spelling of 1618643118 in words is "one billion, six hundred eighteen million, six hundred forty-three thousand, one hundred eighteen".