12820655698 has 8 divisors (see below), whose sum is σ = 19232500860. Its totient is φ = 6409822080.

The previous prime is 12820655693. The next prime is 12820655719. The reversal of 12820655698 is 89655602821.

It can be written as a sum of positive squares in 2 ways, for example, as 11697936649 + 1122719049 = 108157^2 + 33507^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12820655693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220363 + ... + 272398.

Almost surely, 2^12820655698 is an apocalyptic number.

12820655698 is a deficient number, since it is larger than the sum of its proper divisors (6411845162).

12820655698 is a wasteful number, since it uses less digits than its factorization.

12820655698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505772.

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 12820655698 in words is "twelve billion, eight hundred twenty million, six hundred fifty-five thousand, six hundred ninety-eight".