12809261320498 has 8 divisors (see below), whose sum is σ = 19221776227692. Its totient is φ = 6402002577936.

The previous prime is 12809261320489. The next prime is 12809261320529. The reversal of 12809261320498 is 89402316290821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11966708059849 + 842553260649 = 3459293^2 + 917907^2 .

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

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, 1314035065 + ... + 1314044812.

Almost surely, 2^{12809261320498} is an apocalyptic number.

12809261320498 is a deficient number, since it is larger than the sum of its proper divisors (6412514907194).

12809261320498 is a wasteful number, since it uses less digits than its factorization.

12809261320498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628082316.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The spelling of 12809261320498 in words is "twelve trillion, eight hundred nine billion, two hundred sixty-one million, three hundred twenty thousand, four hundred ninety-eight".