4318916721 has 16 divisors (see below), whose sum is σ = 6593255424. Its totient is φ = 2463434064.

The previous prime is 4318916711. The next prime is 4318916737. The reversal of 4318916721 is 1276198134.

It is a happy number.

It is not a de Polignac number, because 4318916721 - 2⁹ = 4318916209 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4318916711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176505 + ... + 199478.

It is an arithmetic number, because the mean of its divisors is an integer number (412078464).

Almost surely, 2^4318916721 is an apocalyptic number.

It is an amenable number.

4318916721 is a deficient number, since it is larger than the sum of its proper divisors (2274338703).

4318916721 is a wasteful number, since it uses less digits than its factorization.

4318916721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376540.

The product of its digits is 72576, while the sum is 42.

The square root of 4318916721 is about 65718.4656013818. The cubic root of 4318916721 is about 1628.5144256320.

The spelling of 4318916721 in words is "four billion, three hundred eighteen million, nine hundred sixteen thousand, seven hundred twenty-one".