12173534144 has 28 divisors (see below), whose sum is σ = 24405909024. Its totient is φ = 6024013824.

The previous prime is 12173534143. The next prime is 12173534173. The reversal of 12173534144 is 44143537121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12173534143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974264 + ... + 986679.

It is an arithmetic number, because the mean of its divisors is an integer number (871639608).

Almost surely, 2^12173534144 is an apocalyptic number.

It is an amenable number.

12173534144 is an abundant number, since it is smaller than the sum of its proper divisors (12232374880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12173534144 is an equidigital number, since it uses as much as digits as its factorization.

12173534144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961052 (or 1961042 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The spelling of 12173534144 in words is "twelve billion, one hundred seventy-three million, five hundred thirty-four thousand, one hundred forty-four".