12566310605551 has 32 divisors (see below), whose sum is σ = 13508289285120. Its totient is φ = 11647790693376.

The previous prime is 12566310605521. The next prime is 12566310605557. The reversal of 12566310605551 is 15550601366521.

It is a cyclic number.

It is not a de Polignac number, because 12566310605551 - 2⁹ = 12566310605039 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 (12566310605557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1832621715 + ... + 1832628571.

It is an arithmetic number, because the mean of its divisors is an integer number (422134040160).

Almost surely, 2^{12566310605551} is an apocalyptic number.

12566310605551 is a deficient number, since it is larger than the sum of its proper divisors (941978679569).

12566310605551 is a wasteful number, since it uses less digits than its factorization.

12566310605551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10863.

The product of its (nonzero) digits is 810000, while the sum is 46.

The spelling of 12566310605551 in words is "twelve trillion, five hundred sixty-six billion, three hundred ten million, six hundred five thousand, five hundred fifty-one".