1218169089 has 12 divisors (see below), whose sum is σ = 1759993872. Its totient is φ = 811920600.

The previous prime is 1218169061. The next prime is 1218169129. The reversal of 1218169089 is 9809618121.

It is not a de Polignac number, because 1218169089 - 2⁷ = 1218168961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218169049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31594 + ... + 58604.

It is an arithmetic number, because the mean of its divisors is an integer number (146666156).

Almost surely, 2^1218169089 is an apocalyptic number.

It is an amenable number.

1218169089 is a deficient number, since it is larger than the sum of its proper divisors (541824783).

1218169089 is a wasteful number, since it uses less digits than its factorization.

1218169089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32028 (or 32025 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The square root of 1218169089 is about 34902.2791376151. The cubic root of 1218169089 is about 1067.9949316975.

The spelling of 1218169089 in words is "one billion, two hundred eighteen million, one hundred sixty-nine thousand, eighty-nine".