7216784489 has 4 divisors (see below), whose sum is σ = 7246980480. Its totient is φ = 7186588500.

The previous prime is 7216784423. The next prime is 7216784527. The reversal of 7216784489 is 9844876127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7216784489 - 2⁸ = 7216784233 is a prime.

It is a super-2 number, since 2×7216784489² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7216783489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15097637 + ... + 15098114.

It is an arithmetic number, because the mean of its divisors is an integer number (1811745120).

Almost surely, 2^7216784489 is an apocalyptic number.

It is an amenable number.

7216784489 is a deficient number, since it is larger than the sum of its proper divisors (30195991).

7216784489 is a wasteful number, since it uses less digits than its factorization.

7216784489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30195990.

The product of its digits is 5419008, while the sum is 56.

The square root of 7216784489 is about 84951.6597189249. The cubic root of 7216784489 is about 1932.4780904886.

The spelling of 7216784489 in words is "seven billion, two hundred sixteen million, seven hundred eighty-four thousand, four hundred eighty-nine".