12561614111605 has 16 divisors (see below), whose sum is σ = 16610993118720. Its totient is φ = 9060541697088.

The previous prime is 12561614111531. The next prime is 12561614111621. The reversal of 12561614111605 is 50611141616521.

12561614111605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12561614111605 - 2¹¹ = 12561614109557 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2247155365 + ... + 2247160954.

It is an arithmetic number, because the mean of its divisors is an integer number (1038187069920).

Almost surely, 2^{12561614111605} is an apocalyptic number.

It is an amenable number.

12561614111605 is a deficient number, since it is larger than the sum of its proper divisors (4049379007115).

12561614111605 is a wasteful number, since it uses less digits than its factorization.

12561614111605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4494316380.

The product of its (nonzero) digits is 43200, while the sum is 40.

The spelling of 12561614111605 in words is "twelve trillion, five hundred sixty-one billion, six hundred fourteen million, one hundred eleven thousand, six hundred five".