12551656256 has 14 divisors (see below), whose sum is σ = 24907193010. Its totient is φ = 6275828096.

The previous prime is 12551656241. The next prime is 12551656279. The reversal of 12551656256 is 65265615521.

It can be written as a sum of positive squares in only one way, i.e., 10543182400 + 2008473856 = 102680^2 + 44816^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98059751 + ... + 98059878.

It is an arithmetic number, because the mean of its divisors is an integer number (1779085215).

Almost surely, 2^12551656256 is an apocalyptic number.

12551656256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12551656256 is a deficient number, since it is larger than the sum of its proper divisors (12355536754).

12551656256 is an equidigital number, since it uses as much as digits as its factorization.

12551656256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196119641 (or 196119631 counting only the distinct ones).

The product of its digits is 540000, while the sum is 44.

The spelling of 12551656256 in words is "twelve billion, five hundred fifty-one million, six hundred fifty-six thousand, two hundred fifty-six".