11216716281 has 27 divisors (see below), whose sum is σ = 16607703567. Its totient is φ = 7295011920.

The previous prime is 11216716219. The next prime is 11216716289. The reversal of 11216716281 is 18261761211.

The square root of 11216716281 is 105909.

It is a perfect power (a square), and thus also a powerful number.

11216716281 is a `hidden beast` number, since 1 + 1 + 21 + 6 + 7 + 1 + 628 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3062626281 + 8154090000 = 55341^2 + 90300^2 .

It is not a de Polignac number, because 11216716281 - 2¹⁹ = 11216191993 is a prime.

It is a super-2 number, since 2×11216716281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11216716289) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13661851 + ... + 13662671.

Almost surely, 2^11216716281 is an apocalyptic number.

11216716281 is the 105909-th square number.

11216716281 is the 52955-th centered octagonal number.

It is an amenable number.

11216716281 is a deficient number, since it is larger than the sum of its proper divisors (5390987286).

11216716281 is an frugal number, since it uses more digits than its factorization.

11216716281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 867 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

Multiplying 11216716281 by its sum of digits (36), we get a square (403801786116 = 635454²).

The spelling of 11216716281 in words is "eleven billion, two hundred sixteen million, seven hundred sixteen thousand, two hundred eighty-one".