11865637465 has 16 divisors (see below), whose sum is σ = 16350736320. Its totient is φ = 8175366720.

The previous prime is 11865637453. The next prime is 11865637471. The reversal of 11865637465 is 56473656811.

11865637465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11865637465 - 2¹⁵ = 11865604697 is a prime.

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, 5676294 + ... + 5678383.

It is an arithmetic number, because the mean of its divisors is an integer number (1021921020).

Almost surely, 2^11865637465 is an apocalyptic number.

It is an amenable number.

11865637465 is a deficient number, since it is larger than the sum of its proper divisors (4485098855).

11865637465 is a wasteful number, since it uses less digits than its factorization.

11865637465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11354712.

The product of its digits is 3628800, while the sum is 52.

The spelling of 11865637465 in words is "eleven billion, eight hundred sixty-five million, six hundred thirty-seven thousand, four hundred sixty-five".