12440555325 has 72 divisors (see below), whose sum is σ = 24965250336. Its totient is φ = 5868720000.

The previous prime is 12440555321. The next prime is 12440555329. The reversal of 12440555325 is 52355504421.

It is an interprime number because it is at equal distance from previous prime (12440555321) and next prime (12440555329).

It is not a de Polignac number, because 12440555325 - 2² = 12440555321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12440555325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12440555321) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23650 + ... + 159500.

It is an arithmetic number, because the mean of its divisors is an integer number (346739588).

Almost surely, 2^12440555325 is an apocalyptic number.

12440555325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12440555325 is an abundant number, since it is smaller than the sum of its proper divisors (12524695011).

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

12440555325 is a wasteful number, since it uses less digits than its factorization.

12440555325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135915 (or 135907 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 36.

It can be divided in two parts, 12440 and 555325, that added together give a palindrome (567765).

The spelling of 12440555325 in words is "twelve billion, four hundred forty million, five hundred fifty-five thousand, three hundred twenty-five".