12525253440 has 112 divisors (see below), whose sum is σ = 45448801152. Its totient is φ = 2862913536.

The previous prime is 12525253399. The next prime is 12525253441. The reversal of 12525253440 is 4435252521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12525253441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 925219 + ... + 938658.

Almost surely, 2^12525253440 is an apocalyptic number.

12525253440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12525253440 is an abundant number, since it is smaller than the sum of its proper divisors (32923547712).

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

12525253440 is a wasteful number, since it uses less digits than its factorization.

12525253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1863904 (or 1863894 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The spelling of 12525253440 in words is "twelve billion, five hundred twenty-five million, two hundred fifty-three thousand, four hundred forty".