12503215444 has 12 divisors (see below), whose sum is σ = 21881582100. Its totient is φ = 6251334848.

The previous prime is 12503215441. The next prime is 12503215453. The reversal of 12503215444 is 44451230521.

It can be written as a sum of positive squares in 2 ways, for example, as 2615299600 + 9887915844 = 51140^2 + 99438^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503215441) 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, 62862 + ... + 170170.

It is an arithmetic number, because the mean of its divisors is an integer number (1823465175).

Almost surely, 2^12503215444 is an apocalyptic number.

It is an amenable number.

12503215444 is a deficient number, since it is larger than the sum of its proper divisors (9378366656).

12503215444 is a wasteful number, since it uses less digits than its factorization.

12503215444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136442 (or 136440 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 12503215444 its reverse (44451230521), we get a palindrome (56954445965).

The spelling of 12503215444 in words is "twelve billion, five hundred three million, two hundred fifteen thousand, four hundred forty-four".