12891102794 has 16 divisors (see below), whose sum is σ = 20331366120. Its totient is φ = 6121268160.

The previous prime is 12891102787. The next prime is 12891102797. The reversal of 12891102794 is 49720119821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10969420225 + 1921682569 = 104735^2 + 43837^2 .

It is not an unprimeable number, because it can be changed into a prime (12891102797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1818269 + ... + 1825344.

Almost surely, 2^12891102794 is an apocalyptic number.

12891102794 is a deficient number, since it is larger than the sum of its proper divisors (7440263326).

12891102794 is a wasteful number, since it uses less digits than its factorization.

12891102794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3643705.

The product of its (nonzero) digits is 72576, while the sum is 44.

The spelling of 12891102794 in words is "twelve billion, eight hundred ninety-one million, one hundred two thousand, seven hundred ninety-four".