12525212423440 has 40 divisors (see below), whose sum is σ = 29126442716928. Its totient is φ = 5009169041280.

The previous prime is 12525212423431. The next prime is 12525212423483. The reversal of 12525212423440 is 4432421252521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×12525212423440² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12525212423440.

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, 13870962 + ... + 14746321.

Almost surely, 2^{12525212423440} is an apocalyptic number.

12525212423440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12525212423440 is an abundant number, since it is smaller than the sum of its proper divisors (16601230293488).

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

12525212423440 is a wasteful number, since it uses less digits than its factorization.

12525212423440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28622767 (or 28622761 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 12525212423440 its reverse (4432421252521), we get a palindrome (16957633675961).

The spelling of 12525212423440 in words is "twelve trillion, five hundred twenty-five billion, two hundred twelve million, four hundred twenty-three thousand, four hundred forty".