7216616729 has 4 divisors (see below), whose sum is σ = 8247561984. Its totient is φ = 6185671476.

The previous prime is 7216616717. The next prime is 7216616731. The reversal of 7216616729 is 9276166127.

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 7216616729 - 2⁴ = 7216616713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7216616779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515472617 + ... + 515472630.

It is an arithmetic number, because the mean of its divisors is an integer number (2061890496).

Almost surely, 2^7216616729 is an apocalyptic number.

It is an amenable number.

7216616729 is a deficient number, since it is larger than the sum of its proper divisors (1030945255).

7216616729 is a wasteful number, since it uses less digits than its factorization.

7216616729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030945254.

The product of its digits is 381024, while the sum is 47.

The square root of 7216616729 is about 84950.6723281223. The cubic root of 7216616729 is about 1932.4631163665.

The spelling of 7216616729 in words is "seven billion, two hundred sixteen million, six hundred sixteen thousand, seven hundred twenty-nine".