1218014181609 has 32 divisors (see below), whose sum is σ = 1719194284800. Its totient is φ = 765856815360.

The previous prime is 1218014181599. The next prime is 1218014181611. The reversal of 1218014181609 is 9061814108121.

It is not a de Polignac number, because 1218014181609 - 2⁵ = 1218014181577 is a prime.

It is a super-4 number, since 4×1218014181609⁴ (a number of 49 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (1218014183609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479164 + ... + 1632674.

It is an arithmetic number, because the mean of its divisors is an integer number (53724821400).

Almost surely, 2^{1218014181609} is an apocalyptic number.

It is an amenable number.

1218014181609 is a deficient number, since it is larger than the sum of its proper divisors (501180103191).

1218014181609 is a wasteful number, since it uses less digits than its factorization.

1218014181609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153825.

The product of its (nonzero) digits is 27648, while the sum is 42.

The spelling of 1218014181609 in words is "one trillion, two hundred eighteen billion, fourteen million, one hundred eighty-one thousand, six hundred nine".