12642631161 has 8 divisors (see below), whose sum is σ = 16875348864. Its totient is φ = 8419167120.

The previous prime is 12642631153. The next prime is 12642631187. The reversal of 12642631161 is 16113624621.

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

It is not a de Polignac number, because 12642631161 - 2³ = 12642631153 is a prime.

It is a super-4 number, since 4×12642631161⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12642631061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2310226 + ... + 2315691.

It is an arithmetic number, because the mean of its divisors is an integer number (2109418608).

Almost surely, 2^12642631161 is an apocalyptic number.

It is an amenable number.

12642631161 is a deficient number, since it is larger than the sum of its proper divisors (4232717703).

12642631161 is an equidigital number, since it uses as much as digits as its factorization.

12642631161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626831.

The product of its digits is 10368, while the sum is 33.

The spelling of 12642631161 in words is "twelve billion, six hundred forty-two million, six hundred thirty-one thousand, one hundred sixty-one".