12880665838 has 4 divisors (see below), whose sum is σ = 19320998760. Its totient is φ = 6440332918.

The previous prime is 12880665803. The next prime is 12880665841. The reversal of 12880665838 is 83856608821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83856608821 = 37 ⋅2266394833.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3220166458 + ... + 3220166461.

It is an arithmetic number, because the mean of its divisors is an integer number (4830249690).

Almost surely, 2^12880665838 is an apocalyptic number.

12880665838 is a deficient number, since it is larger than the sum of its proper divisors (6440332922).

12880665838 is an equidigital number, since it uses as much as digits as its factorization.

12880665838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6440332921.

The product of its (nonzero) digits is 4423680, while the sum is 55.

The spelling of 12880665838 in words is "twelve billion, eight hundred eighty million, six hundred sixty-five thousand, eight hundred thirty-eight".