1218497912 has 32 divisors (see below), whose sum is σ = 2381491920. Its totient is φ = 583925760.

The previous prime is 1218497897. The next prime is 1218497921. The reversal of 1218497912 is 2197948121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10889 + ... + 50552.

Almost surely, 2^1218497912 is an apocalyptic number.

It is an amenable number.

1218497912 is a deficient number, since it is larger than the sum of its proper divisors (1162994008).

1218497912 is a wasteful number, since it uses less digits than its factorization.

1218497912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61551 (or 61547 counting only the distinct ones).

The product of its digits is 72576, while the sum is 44.

The square root of 1218497912 is about 34906.9894433765. The cubic root of 1218497912 is about 1068.0910184414.

The spelling of 1218497912 in words is "one billion, two hundred eighteen million, four hundred ninety-seven thousand, nine hundred twelve".