11216395872 has 72 divisors (see below), whose sum is σ = 34796328840. Its totient is φ = 3398906880.

The previous prime is 11216395867. The next prime is 11216395873. The reversal of 11216395872 is 27859361211.

11216395872 is a `hidden beast` number, since 1 + 1 + 2 + 1 + 63 + 9 + 587 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×11216395872³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11216395873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1767097 + ... + 1773432.

It is an arithmetic number, because the mean of its divisors is an integer number (483282345).

Almost surely, 2^11216395872 is an apocalyptic number.

11216395872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11216395872 is an abundant number, since it is smaller than the sum of its proper divisors (23579932968).

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

11216395872 is a wasteful number, since it uses less digits than its factorization.

11216395872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540556 (or 3540545 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The spelling of 11216395872 in words is "eleven billion, two hundred sixteen million, three hundred ninety-five thousand, eight hundred seventy-two".