11665391744 has 16 divisors (see below), whose sum is σ = 23239647870. Its totient is φ = 5832695808.

The previous prime is 11665391737. The next prime is 11665391797. The reversal of 11665391744 is 44719356611.

It can be written as a sum of positive squares in only one way, i.e., 8012398144 + 3652993600 = 89512^2 + 60440^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45567809 + ... + 45568064.

Almost surely, 2^11665391744 is an apocalyptic number.

It is an amenable number.

11665391744 is a deficient number, since it is larger than the sum of its proper divisors (11574256126).

11665391744 is an frugal number, since it uses more digits than its factorization.

11665391744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91135887 (or 91135875 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The spelling of 11665391744 in words is "eleven billion, six hundred sixty-five million, three hundred ninety-one thousand, seven hundred forty-four".