11365038665 has 16 divisors (see below), whose sum is σ = 14452436880. Its totient is φ = 8564398080.

The previous prime is 11365038593. The next prime is 11365038683. The reversal of 11365038665 is 56683056311.

It can be written as a sum of positive squares in 8 ways, for example, as 4880279881 + 6484758784 = 69859^2 + 80528^2 .

It is not a de Polignac number, because 11365038665 - 2⁸ = 11365038409 is a prime.

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, 949904 + ... + 961793.

It is an arithmetic number, because the mean of its divisors is an integer number (903277305).

Almost surely, 2^11365038665 is an apocalyptic number.

It is an amenable number.

11365038665 is a deficient number, since it is larger than the sum of its proper divisors (3087398215).

11365038665 is a wasteful number, since it uses less digits than its factorization.

11365038665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911772.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 11365038665 in words is "eleven billion, three hundred sixty-five million, thirty-eight thousand, six hundred sixty-five".