11321644356 has 72 divisors (see below), whose sum is σ = 32064125184. Its totient is φ = 3338072640.

The previous prime is 11321644349. The next prime is 11321644417. The reversal of 11321644356 is 65344612311.

11321644356 is a `hidden beast` number, since 1 + 1 + 3 + 2 + 1 + 644 + 3 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11321644356.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 371700 + ... + 401003.

It is an arithmetic number, because the mean of its divisors is an integer number (445335072).

Almost surely, 2^11321644356 is an apocalyptic number.

It is an amenable number.

11321644356 is an abundant number, since it is smaller than the sum of its proper divisors (20742480828).

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

11321644356 is a wasteful number, since it uses less digits than its factorization.

11321644356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772761 (or 772756 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 11321644356 in words is "eleven billion, three hundred twenty-one million, six hundred forty-four thousand, three hundred fifty-six".