12556828505 has 8 divisors (see below), whose sum is σ = 16227286152. Its totient is φ = 9272734848.

The previous prime is 12556828457. The next prime is 12556828513. The reversal of 12556828505 is 50582865521.

It can be written as a sum of positive squares in 4 ways, for example, as 1274989849 + 11281838656 = 35707^2 + 106216^2 .

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

It is not a de Polignac number, because 12556828505 - 2⁶ = 12556828441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12556828505.

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, 96590924 + ... + 96591053.

It is an arithmetic number, because the mean of its divisors is an integer number (2028410769).

Almost surely, 2^12556828505 is an apocalyptic number.

It is an amenable number.

12556828505 is a deficient number, since it is larger than the sum of its proper divisors (3670457647).

12556828505 is a wasteful number, since it uses less digits than its factorization.

12556828505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193181995.

The product of its (nonzero) digits is 960000, while the sum is 47.

The spelling of 12556828505 in words is "twelve billion, five hundred fifty-six million, eight hundred twenty-eight thousand, five hundred five".