12181654631504 has 80 divisors (see below), whose sum is σ = 23927329445760. Its totient is φ = 6007383513600.

The previous prime is 12181654631491. The next prime is 12181654631521. The reversal of 12181654631504 is 40513645618121.

It is a super-2 number, since 2×12181654631504² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449377919 + ... + 449405025.

It is an arithmetic number, because the mean of its divisors is an integer number (299091618072).

Almost surely, 2^{12181654631504} is an apocalyptic number.

It is an amenable number.

12181654631504 is a deficient number, since it is larger than the sum of its proper divisors (11745674814256).

12181654631504 is a wasteful number, since it uses less digits than its factorization.

12181654631504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28308 (or 28302 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 12181654631504 in words is "twelve trillion, one hundred eighty-one billion, six hundred fifty-four million, six hundred thirty-one thousand, five hundred four".