12896546638 has 8 divisors (see below), whose sum is σ = 19816644960. Its totient is φ = 6290998320.

The previous prime is 12896546563. The next prime is 12896546669. The reversal of 12896546638 is 83664569821.

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

It is a super-2 number, since 2×12896546638² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78637398 + ... + 78637561.

It is an arithmetic number, because the mean of its divisors is an integer number (2477080620).

Almost surely, 2^12896546638 is an apocalyptic number.

12896546638 is a deficient number, since it is larger than the sum of its proper divisors (6920098322).

12896546638 is a wasteful number, since it uses less digits than its factorization.

12896546638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157275002.

The product of its digits is 14929920, while the sum is 58.

The spelling of 12896546638 in words is "twelve billion, eight hundred ninety-six million, five hundred forty-six thousand, six hundred thirty-eight".