5680216721 has 4 divisors (see below), whose sum is σ = 5680380912. Its totient is φ = 5680052532.

The previous prime is 5680216697. The next prime is 5680216741. The reversal of 5680216721 is 1276120865.

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 a de Polignac number, because none of the positive numbers 2^k-5680216721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5680216741) 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, 7775 + ... + 106868.

It is an arithmetic number, because the mean of its divisors is an integer number (1420095228).

Almost surely, 2^5680216721 is an apocalyptic number.

It is an amenable number.

5680216721 is a deficient number, since it is larger than the sum of its proper divisors (164191).

5680216721 is a wasteful number, since it uses less digits than its factorization.

5680216721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164190.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 5680216721 is about 75367.2125065005. The cubic root of 5680216721 is about 1784.2469730246.

The spelling of 5680216721 in words is "five billion, six hundred eighty million, two hundred sixteen thousand, seven hundred twenty-one".