11805531764 has 48 divisors (see below), whose sum is σ = 22425358032. Its totient is φ = 5405632512.

The previous prime is 11805531743. The next prime is 11805531791. The reversal of 11805531764 is 46713550811.

It can be written as a sum of positive squares in 8 ways, for example, as 2260241764 + 9545290000 = 47542^2 + 97700^2 .

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, 5333522 + ... + 5335734.

It is an arithmetic number, because the mean of its divisors is an integer number (467194959).

Almost surely, 2^11805531764 is an apocalyptic number.

It is an amenable number.

11805531764 is a deficient number, since it is larger than the sum of its proper divisors (10619826268).

11805531764 is a wasteful number, since it uses less digits than its factorization.

11805531764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2996 (or 2994 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 11805531764 in words is "eleven billion, eight hundred five million, five hundred thirty-one thousand, seven hundred sixty-four".