12608856261 has 12 divisors (see below), whose sum is σ = 18393118380. Its totient is φ = 8322676800.

The previous prime is 12608856257. The next prime is 12608856317. The reversal of 12608856261 is 16265880621.

12608856261 is a `hidden beast` number, since 1 + 2 + 6 + 0 + 88 + 562 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10882453761 + 1726402500 = 104319^2 + 41550^2 .

It is not a de Polignac number, because 12608856261 - 2² = 12608856257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12608854261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6934656 + ... + 6936473.

It is an arithmetic number, because the mean of its divisors is an integer number (1532759865).

Almost surely, 2^12608856261 is an apocalyptic number.

It is an amenable number.

12608856261 is a deficient number, since it is larger than the sum of its proper divisors (5784262119).

12608856261 is a wasteful number, since it uses less digits than its factorization.

12608856261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13871236 (or 13871233 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 12608856261 in words is "twelve billion, six hundred eight million, eight hundred fifty-six thousand, two hundred sixty-one".