12896749138 has 48 divisors (see below), whose sum is σ = 24250109184. Its totient is φ = 5098736160.

The previous prime is 12896749133. The next prime is 12896749139. The reversal of 12896749138 is 83194769821.

It is a super-2 number, since 2×12896749138² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12896749133) 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 23 ways as a sum of consecutive naturals, for example, 3298981 + ... + 3302887.

It is an arithmetic number, because the mean of its divisors is an integer number (505210608).

Almost surely, 2^12896749138 is an apocalyptic number.

12896749138 is a deficient number, since it is larger than the sum of its proper divisors (11353360046).

12896749138 is a wasteful number, since it uses less digits than its factorization.

12896749138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6527 (or 6520 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 58.

The spelling of 12896749138 in words is "twelve billion, eight hundred ninety-six million, seven hundred forty-nine thousand, one hundred thirty-eight".