12145581726 has 32 divisors (see below), whose sum is σ = 24429081600. Its totient is φ = 4025568096.

The previous prime is 12145581689. The next prime is 12145581737. The reversal of 12145581726 is 62718554121.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2919640 + ... + 2923796.

It is an arithmetic number, because the mean of its divisors is an integer number (763408800).

Almost surely, 2^12145581726 is an apocalyptic number.

12145581726 is an abundant number, since it is smaller than the sum of its proper divisors (12283499874).

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

12145581726 is a wasteful number, since it uses less digits than its factorization.

12145581726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6808.

The product of its digits is 134400, while the sum is 42.

The spelling of 12145581726 in words is "twelve billion, one hundred forty-five million, five hundred eighty-one thousand, seven hundred twenty-six".