12172279424 has 32 divisors (see below), whose sum is σ = 24840923940. Its totient is φ = 5937694720.

The previous prime is 12172279423. The next prime is 12172279477. The reversal of 12172279424 is 42497227121.

It can be written as a sum of positive squares in 2 ways, for example, as 9260597824 + 2911681600 = 96232^2 + 53960^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (12172279421) 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, 1154459 + ... + 1164954.

Almost surely, 2^12172279424 is an apocalyptic number.

It is an amenable number.

12172279424 is an abundant number, since it is smaller than the sum of its proper divisors (12668644516).

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

12172279424 is an equidigital number, since it uses as much as digits as its factorization.

12172279424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319468 (or 2319456 counting only the distinct ones).

The product of its digits is 112896, while the sum is 41.

The spelling of 12172279424 in words is "twelve billion, one hundred seventy-two million, two hundred seventy-nine thousand, four hundred twenty-four".