11846564821 has 24 divisors (see below), whose sum is σ = 14987771064. Its totient is φ = 9280252800.

The previous prime is 11846564819. The next prime is 11846564857. The reversal of 11846564821 is 12846564811.

11846564821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 4397148721 + 7449416100 = 66311^2 + 86310^2 .

It is not a de Polignac number, because 11846564821 - 2¹ = 11846564819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11846564881) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 27730 + ... + 156403.

It is an arithmetic number, because the mean of its divisors is an integer number (624490461).

Almost surely, 2^11846564821 is an apocalyptic number.

It is an amenable number.

11846564821 is a deficient number, since it is larger than the sum of its proper divisors (3141206243).

11846564821 is a wasteful number, since it uses less digits than its factorization.

11846564821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184261 (or 184254 counting only the distinct ones).

The product of its digits is 368640, while the sum is 46.

The spelling of 11846564821 in words is "eleven billion, eight hundred forty-six million, five hundred sixty-four thousand, eight hundred twenty-one".