12181654631537 has 8 divisors (see below), whose sum is σ = 12183934958016. Its totient is φ = 12179374501392.

The previous prime is 12181654631521. The next prime is 12181654631543. The reversal of 12181654631537 is 73513645618121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12181654631537 - 2⁴ = 12181654631521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12181654631137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182509823 + ... + 182576555.

It is an arithmetic number, because the mean of its divisors is an integer number (1522991869752).

Almost surely, 2^{12181654631537} is an apocalyptic number.

It is an amenable number.

12181654631537 is a deficient number, since it is larger than the sum of its proper divisors (2280326479).

12181654631537 is an equidigital number, since it uses as much as digits as its factorization.

12181654631537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98167.

The product of its digits is 3628800, while the sum is 53.

The spelling of 12181654631537 in words is "twelve trillion, one hundred eighty-one billion, six hundred fifty-four million, six hundred thirty-one thousand, five hundred thirty-seven".