12145013540 has 24 divisors (see below), whose sum is σ = 27823122432. Its totient is φ = 4416368480.

The previous prime is 12145013513. The next prime is 12145013557. The reversal of 12145013540 is 4531054121.

12145013540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27602084 + ... + 27602523.

It is an arithmetic number, because the mean of its divisors is an integer number (1159296768).

Almost surely, 2^12145013540 is an apocalyptic number.

12145013540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12145013540 is an abundant number, since it is smaller than the sum of its proper divisors (15678108892).

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

12145013540 is a wasteful number, since it uses less digits than its factorization.

12145013540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55204627 (or 55204625 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 12145013540 its reverse (4531054121), we get a palindrome (16676067661).

The spelling of 12145013540 in words is "twelve billion, one hundred forty-five million, thirteen thousand, five hundred forty".