12556888805 has 8 divisors (see below), whose sum is σ = 15069112344. Its totient is φ = 10044947200.

The previous prime is 12556888769. The next prime is 12556888849. The reversal of 12556888805 is 50888865521.

It can be written as a sum of positive squares in 4 ways, for example, as 137569441 + 12419319364 = 11729^2 + 111442^2 .

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

It is not a de Polignac number, because 12556888805 - 2⁶ = 12556888741 is a prime.

It is a super-2 number, since 2×12556888805² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44585 + ... + 164625.

It is an arithmetic number, because the mean of its divisors is an integer number (1883639043).

Almost surely, 2^12556888805 is an apocalyptic number.

It is an amenable number.

12556888805 is a deficient number, since it is larger than the sum of its proper divisors (2512223539).

12556888805 is a wasteful number, since it uses less digits than its factorization.

12556888805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140967.

The product of its (nonzero) digits is 6144000, while the sum is 56.

The spelling of 12556888805 in words is "twelve billion, five hundred fifty-six million, eight hundred eighty-eight thousand, eight hundred five".