12440253434 has 8 divisors (see below), whose sum is σ = 21326148768. Its totient is φ = 5331537180.

The previous prime is 12440253433. The next prime is 12440253437. The reversal of 12440253434 is 43435204421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12440253434.

It is not an unprimeable number, because it can be changed into a prime (12440253433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 444294752 + ... + 444294779.

It is an arithmetic number, because the mean of its divisors is an integer number (2665768596).

Almost surely, 2^12440253434 is an apocalyptic number.

12440253434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

12440253434 is a deficient number, since it is larger than the sum of its proper divisors (8885895334).

12440253434 is an equidigital number, since it uses as much as digits as its factorization.

12440253434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888589540.

The product of its (nonzero) digits is 46080, while the sum is 32.

Adding to 12440253434 its reverse (43435204421), we get a palindrome (55875457855).

The spelling of 12440253434 in words is "twelve billion, four hundred forty million, two hundred fifty-three thousand, four hundred thirty-four".