135661686441404 has 12 divisors (see below), whose sum is σ = 237676816455624. Its totient is φ = 67754024596944.

The previous prime is 135661686441401. The next prime is 135661686441511. The reversal of 135661686441404 is 404144686166531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135661686441401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19204651967 + ... + 19204659030.

It is an arithmetic number, because the mean of its divisors is an integer number (19806401371302).

Almost surely, 2^{135661686441404} is an apocalyptic number.

It is an amenable number.

135661686441404 is a deficient number, since it is larger than the sum of its proper divisors (102015130014220).

135661686441404 is a wasteful number, since it uses less digits than its factorization.

135661686441404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38409311884 (or 38409311882 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 59.

The spelling of 135661686441404 in words is "one hundred thirty-five trillion, six hundred sixty-one billion, six hundred eighty-six million, four hundred forty-one thousand, four hundred four".