11685561135538 has 8 divisors (see below), whose sum is σ = 17692157981232. Its totient is φ = 5788175141796.

The previous prime is 11685561135509. The next prime is 11685561135559. The reversal of 11685561135538 is 83553116558611.

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

It is an unprimeable number.

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, 27302712720 + ... + 27302713147.

It is an arithmetic number, because the mean of its divisors is an integer number (2211519747654).

Almost surely, 2^{11685561135538} is an apocalyptic number.

11685561135538 is a deficient number, since it is larger than the sum of its proper divisors (6006596845694).

11685561135538 is a wasteful number, since it uses less digits than its factorization.

11685561135538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54605425976.

The product of its digits is 12960000, while the sum is 58.

The spelling of 11685561135538 in words is "eleven trillion, six hundred eighty-five billion, five hundred sixty-one million, one hundred thirty-five thousand, five hundred thirty-eight".