11221974864 has 240 divisors, whose sum is σ = 34366550400. Its totient is φ = 3406233600.

The previous prime is 11221974847. The next prime is 11221974887. The reversal of 11221974864 is 46847912211.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7963792 + ... + 7965200.

It is an arithmetic number, because the mean of its divisors is an integer number (143193960).

Almost surely, 2^11221974864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11221974864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17183275200).

11221974864 is an abundant number, since it is smaller than the sum of its proper divisors (23144575536).

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

11221974864 is a wasteful number, since it uses less digits than its factorization.

11221974864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1545 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The spelling of 11221974864 in words is "eleven billion, two hundred twenty-one million, nine hundred seventy-four thousand, eight hundred sixty-four".