12181654631518 has 32 divisors (see below), whose sum is σ = 18821769120000. Its totient is φ = 5909406655680.

The previous prime is 12181654631491. The next prime is 12181654631521. The reversal of 12181654631518 is 81513645618121.

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, 32104713 + ... + 32481931.

It is an arithmetic number, because the mean of its divisors is an integer number (588180285000).

Almost surely, 2^{12181654631518} is an apocalyptic number.

12181654631518 is a deficient number, since it is larger than the sum of its proper divisors (6640114488482).

12181654631518 is a wasteful number, since it uses less digits than its factorization.

12181654631518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379440.

The product of its digits is 1382400, while the sum is 52.

The spelling of 12181654631518 in words is "twelve trillion, one hundred eighty-one billion, six hundred fifty-four million, six hundred thirty-one thousand, five hundred eighteen".