1218492165 has 16 divisors (see below), whose sum is σ = 2126822976. Its totient is φ = 590784000.

The previous prime is 1218492113. The next prime is 1218492203. The reversal of 1218492165 is 5612948121.

It is not a de Polignac number, because 1218492165 - 2⁸ = 1218491909 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3692236 + ... + 3692565.

It is an arithmetic number, because the mean of its divisors is an integer number (132926436).

Almost surely, 2^1218492165 is an apocalyptic number.

1218492165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1218492165 is a deficient number, since it is larger than the sum of its proper divisors (908330811).

1218492165 is a wasteful number, since it uses less digits than its factorization.

1218492165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7384820.

The product of its digits is 34560, while the sum is 39.

The square root of 1218492165 is about 34906.9071245219. The cubic root of 1218492165 is about 1068.0893392349.

The spelling of 1218492165 in words is "one billion, two hundred eighteen million, four hundred ninety-two thousand, one hundred sixty-five".