12606410305661 has 4 divisors (see below), whose sum is σ = 12629712358524. Its totient is φ = 12583108252800.

The previous prime is 12606410305651. The next prime is 12606410305663. The reversal of 12606410305661 is 16650301460621.

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 6080199229636 + 6526211076025 = 2465806^2 + 2554645^2 .

It is a cyclic number.

It is not a de Polignac number, because 12606410305661 - 2¹⁰ = 12606410304637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12606410305663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11651025620 + ... + 11651026701.

It is an arithmetic number, because the mean of its divisors is an integer number (3157428089631).

Almost surely, 2^{12606410305661} is an apocalyptic number.

It is an amenable number.

12606410305661 is a deficient number, since it is larger than the sum of its proper divisors (23302052863).

12606410305661 is an equidigital number, since it uses as much as digits as its factorization.

12606410305661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23302052862.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 12606410305661 in words is "twelve trillion, six hundred six billion, four hundred ten million, three hundred five thousand, six hundred sixty-one".