11585181805 has 16 divisors (see below), whose sum is σ = 14037562944. Its totient is φ = 9178323840.

The previous prime is 11585181799. The next prime is 11585181863. The reversal of 11585181805 is 50818158511.

It is a de Polignac number, because none of the positive numbers 2^k-11585181805 is a prime.

It is a Duffinian number.

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, 203722 + ... + 254308.

It is an arithmetic number, because the mean of its divisors is an integer number (877347684).

Almost surely, 2^11585181805 is an apocalyptic number.

It is an amenable number.

11585181805 is a deficient number, since it is larger than the sum of its proper divisors (2452381139).

11585181805 is a wasteful number, since it uses less digits than its factorization.

11585181805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51036.

The product of its (nonzero) digits is 64000, while the sum is 43.

The spelling of 11585181805 in words is "eleven billion, five hundred eighty-five million, one hundred eighty-one thousand, eight hundred five".