12681138185726 has 32 divisors (see below), whose sum is σ = 20744859723840. Its totient is φ = 5795389264896.

The previous prime is 12681138185687. The next prime is 12681138185741. The reversal of 12681138185726 is 62758183118621.

It is a super-2 number, since 2×12681138185726² (a number of 27 digits) contains 22 as substring.

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, 48871121 + ... + 49129916.

It is an arithmetic number, because the mean of its divisors is an integer number (648276866370).

Almost surely, 2^{12681138185726} is an apocalyptic number.

12681138185726 is a deficient number, since it is larger than the sum of its proper divisors (8063721538114).

12681138185726 is a wasteful number, since it uses less digits than its factorization.

12681138185726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98001188.

The product of its digits is 7741440, while the sum is 59.

The spelling of 12681138185726 in words is "twelve trillion, six hundred eighty-one billion, one hundred thirty-eight million, one hundred eighty-five thousand, seven hundred twenty-six".