11512043665 has 16 divisors (see below), whose sum is σ = 14625604800. Its totient is φ = 8674471872.

The previous prime is 11512043633. The next prime is 11512043671. The reversal of 11512043665 is 56634021511.

11512043665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 11512043665 - 2⁵ = 11512043633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11512043665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 333795 + ... + 366664.

It is an arithmetic number, because the mean of its divisors is an integer number (914100300).

Almost surely, 2^11512043665 is an apocalyptic number.

It is an amenable number.

11512043665 is a deficient number, since it is larger than the sum of its proper divisors (3113561135).

11512043665 is a wasteful number, since it uses less digits than its factorization.

11512043665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700656.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 11512043665 in words is "eleven billion, five hundred twelve million, forty-three thousand, six hundred sixty-five".