11865664401 has 8 divisors (see below), whose sum is σ = 15862195200. Its totient is φ = 7889788272.

The previous prime is 11865664397. The next prime is 11865664411. The reversal of 11865664401 is 10446656811.

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

It is not a de Polignac number, because 11865664401 - 2² = 11865664397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11865664411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5162326 + ... + 5164623.

It is an arithmetic number, because the mean of its divisors is an integer number (1982774400).

Almost surely, 2^11865664401 is an apocalyptic number.

It is an amenable number.

11865664401 is a deficient number, since it is larger than the sum of its proper divisors (3996530799).

11865664401 is a wasteful number, since it uses less digits than its factorization.

11865664401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327335.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 11865664401 in words is "eleven billion, eight hundred sixty-five million, six hundred sixty-four thousand, four hundred one".