11865382471 has 4 divisors (see below), whose sum is σ = 11865808192. Its totient is φ = 11864956752.

The previous prime is 11865382457. The next prime is 11865382483. The reversal of 11865382471 is 17428356811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11865382471 - 2⁷ = 11865382343 is a prime.

It is a super-3 number, since 3×11865382471³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11865382421) 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 3 ways as a sum of consecutive naturals, for example, 167886 + ... + 227851.

It is an arithmetic number, because the mean of its divisors is an integer number (2966452048).

Almost surely, 2^11865382471 is an apocalyptic number.

11865382471 is a deficient number, since it is larger than the sum of its proper divisors (425721).

11865382471 is an equidigital number, since it uses as much as digits as its factorization.

11865382471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425720.

The product of its digits is 322560, while the sum is 46.

The spelling of 11865382471 in words is "eleven billion, eight hundred sixty-five million, three hundred eighty-two thousand, four hundred seventy-one".