12518417510440 has 16 divisors (see below), whose sum is σ = 28166439398580. Its totient is φ = 5007367004160.

The previous prime is 12518417510437. The next prime is 12518417510449. The reversal of 12518417510440 is 4401571481521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12495136243716 + 23281266724 = 3534846^2 + 152582^2 .

It is not an unprimeable number, because it can be changed into a prime (12518417510449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156480218841 + ... + 156480218920.

Almost surely, 2^{12518417510440} is an apocalyptic number.

12518417510440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12518417510440 is an abundant number, since it is smaller than the sum of its proper divisors (15648021888140).

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

12518417510440 is a wasteful number, since it uses less digits than its factorization.

12518417510440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312960437772 (or 312960437768 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

Adding to 12518417510440 its reverse (4401571481521), we get a palindrome (16919988991961).

The spelling of 12518417510440 in words is "twelve trillion, five hundred eighteen billion, four hundred seventeen million, five hundred ten thousand, four hundred forty".