12561061076 has 6 divisors (see below), whose sum is σ = 21981856890. Its totient is φ = 6280530536.

The previous prime is 12561061039. The next prime is 12561061087. The reversal of 12561061076 is 67016016521.

12561061076 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8944241476 + 3616819600 = 94574^2 + 60140^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1570132631 + ... + 1570132638.

It is an arithmetic number, because the mean of its divisors is an integer number (3663642815).

Almost surely, 2^12561061076 is an apocalyptic number.

It is an amenable number.

12561061076 is a deficient number, since it is larger than the sum of its proper divisors (9420795814).

12561061076 is a wasteful number, since it uses less digits than its factorization.

12561061076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140265273 (or 3140265271 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

Adding to 12561061076 its reverse (67016016521), we get a palindrome (79577077597).

The spelling of 12561061076 in words is "twelve billion, five hundred sixty-one million, sixty-one thousand, seventy-six".