11538681759 has 24 divisors (see below), whose sum is σ = 18239571792. Its totient is φ = 6971061120.

The previous prime is 11538681757. The next prime is 11538681767. The reversal of 11538681759 is 95718683511.

It is a happy number.

11538681759 is a `hidden beast` number, since 115 + 386 + 81 + 75 + 9 = 666.

It is not a de Polignac number, because 11538681759 - 2¹ = 11538681757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11538681757) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152454 + ... + 215219.

It is an arithmetic number, because the mean of its divisors is an integer number (759982158).

Almost surely, 2^11538681759 is an apocalyptic number.

11538681759 is a deficient number, since it is larger than the sum of its proper divisors (6700890033).

11538681759 is a wasteful number, since it uses less digits than its factorization.

11538681759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368007 (or 368004 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 54.

The spelling of 11538681759 in words is "eleven billion, five hundred thirty-eight million, six hundred eighty-one thousand, seven hundred fifty-nine".