12809417794 has 4 divisors (see below), whose sum is σ = 19214126694. Its totient is φ = 6404708896.

The previous prime is 12809417779. The next prime is 12809417809. The reversal of 12809417794 is 49771490821.

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: 49771490821 = 13 ⋅3828576217.

It is an interprime number because it is at equal distance from previous prime (12809417779) and next prime (12809417809).

It can be written as a sum of positive squares in only one way, i.e., 12805864569 + 3553225 = 113163^2 + 1885^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202354447 + ... + 3202354450.

Almost surely, 2^12809417794 is an apocalyptic number.

12809417794 is a deficient number, since it is larger than the sum of its proper divisors (6404708900).

12809417794 is an equidigital number, since it uses as much as digits as its factorization.

12809417794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6404708899.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The spelling of 12809417794 in words is "twelve billion, eight hundred nine million, four hundred seventeen thousand, seven hundred ninety-four".