12640271142 has 32 divisors (see below), whose sum is σ = 26702945280. Its totient is φ = 3982678560.

The previous prime is 12640271131. The next prime is 12640271143. The reversal of 12640271142 is 24117204621.

12640271142 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640271143) 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 15 ways as a sum of consecutive naturals, for example, 782217 + ... + 798212.

It is an arithmetic number, because the mean of its divisors is an integer number (834467040).

Almost surely, 2^12640271142 is an apocalyptic number.

12640271142 is an abundant number, since it is smaller than the sum of its proper divisors (14062674138).

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

12640271142 is a wasteful number, since it uses less digits than its factorization.

12640271142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580508.

The product of its (nonzero) digits is 5376, while the sum is 30.

Adding to 12640271142 its reverse (24117204621), we get a palindrome (36757475763).

The spelling of 12640271142 in words is "twelve billion, six hundred forty million, two hundred seventy-one thousand, one hundred forty-two".