11843220864 has 64 divisors (see below), whose sum is σ = 31837659840. Its totient is φ = 3900166656.

The previous prime is 11843220853. The next prime is 11843220869. The reversal of 11843220864 is 46802234811.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11843220869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153922 + ... + 217665.

It is an arithmetic number, because the mean of its divisors is an integer number (497463435).

Almost surely, 2^11843220864 is an apocalyptic number.

It is an amenable number.

11843220864 is an abundant number, since it is smaller than the sum of its proper divisors (19994438976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11843220864 is an equidigital number, since it uses as much as digits as its factorization.

11843220864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371687 (or 371675 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The spelling of 11843220864 in words is "eleven billion, eight hundred forty-three million, two hundred twenty thousand, eight hundred sixty-four".