11665647044 has 24 divisors (see below), whose sum is σ = 22023609048. Its totient is φ = 5386135040.

The previous prime is 11665647043. The next prime is 11665647047. The reversal of 11665647044 is 44074656611.

It can be written as a sum of positive squares in 4 ways, for example, as 7682522500 + 3983124544 = 87650^2 + 63112^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11665646986 and 11665647004.

It is not an unprimeable number, because it can be changed into a prime (11665647043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1614827 + ... + 1622034.

It is an arithmetic number, because the mean of its divisors is an integer number (917650377).

Almost surely, 2^11665647044 is an apocalyptic number.

It is an amenable number.

11665647044 is a deficient number, since it is larger than the sum of its proper divisors (10357962004).

11665647044 is a wasteful number, since it uses less digits than its factorization.

11665647044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3236935 (or 3236933 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 11665647044 in words is "eleven billion, six hundred sixty-five million, six hundred forty-seven thousand, forty-four".