12561636034 has 8 divisors (see below), whose sum is σ = 19029013308. Its totient is φ = 6218631600.

The previous prime is 12561636023. The next prime is 12561636037. The reversal of 12561636034 is 43063616521.

It can be written as a sum of positive squares in 2 ways, for example, as 10427473225 + 2134162809 = 102115^2 + 46197^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12561635984 and 12561636002.

It is not an unprimeable number, because it can be changed into a prime (12561636037) 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 3 ways as a sum of consecutive naturals, for example, 31092957 + ... + 31093360.

Almost surely, 2^12561636034 is an apocalyptic number.

12561636034 is a deficient number, since it is larger than the sum of its proper divisors (6467377274).

12561636034 is a wasteful number, since it uses less digits than its factorization.

12561636034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62186420.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 12561636034 in words is "twelve billion, five hundred sixty-one million, six hundred thirty-six thousand, thirty-four".