12606345720961 has 4 divisors (see below), whose sum is σ = 12607901875924. Its totient is φ = 12604789566000.

The previous prime is 12606345720929. The next prime is 12606345720989. The reversal of 12606345720961 is 16902754360621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10104254480961 + 2502091240000 = 3178719^2 + 1581800^2 .

It is a cyclic number.

It is not a de Polignac number, because 12606345720961 - 2⁵ = 12606345720929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12606345720899 and 12606345720908.

It is not an unprimeable number, because it can be changed into a prime (12606345720911) 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, 778065330 + ... + 778081531.

It is an arithmetic number, because the mean of its divisors is an integer number (3151975468981).

Almost surely, 2^{12606345720961} is an apocalyptic number.

It is an amenable number.

12606345720961 is a deficient number, since it is larger than the sum of its proper divisors (1556154963).

12606345720961 is an equidigital number, since it uses as much as digits as its factorization.

12606345720961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1556154962.

The product of its (nonzero) digits is 3265920, while the sum is 52.

The spelling of 12606345720961 in words is "twelve trillion, six hundred six billion, three hundred forty-five million, seven hundred twenty thousand, nine hundred sixty-one".