11515650665 has 8 divisors (see below), whose sum is σ = 13821762240. Its totient is φ = 9210532912.

The previous prime is 11515650617. The next prime is 11515650683. The reversal of 11515650665 is 56605651511.

11515650665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11515650665 - 2¹⁰ = 11515649641 is a prime.

It is a super-2 number, since 2×11515650665² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 222719 + ... + 269508.

It is an arithmetic number, because the mean of its divisors is an integer number (1727720280).

Almost surely, 2^11515650665 is an apocalyptic number.

It is an amenable number.

11515650665 is a deficient number, since it is larger than the sum of its proper divisors (2306111575).

11515650665 is an equidigital number, since it uses as much as digits as its factorization.

11515650665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496911.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 11515650665 in words is "eleven billion, five hundred fifteen million, six hundred fifty thousand, six hundred sixty-five".