12640271115 has 32 divisors (see below), whose sum is σ = 21112035840. Its totient is φ = 6445840896.

The previous prime is 12640271107. The next prime is 12640271129. The reversal of 12640271115 is 51117204621.

It is not a de Polignac number, because 12640271115 - 2³ = 12640271107 is a prime.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1137456 + ... + 1148514.

It is an arithmetic number, because the mean of its divisors is an integer number (659751120).

Almost surely, 2^12640271115 is an apocalyptic number.

12640271115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12640271115 is a deficient number, since it is larger than the sum of its proper divisors (8471764725).

12640271115 is a wasteful number, since it uses less digits than its factorization.

12640271115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14403.

The product of its (nonzero) digits is 3360, while the sum is 30.

Adding to 12640271115 its reverse (51117204621), we get a palindrome (63757475736).

The spelling of 12640271115 in words is "twelve billion, six hundred forty million, two hundred seventy-one thousand, one hundred fifteen".