4576520721 has 8 divisors (see below), whose sum is σ = 6137300160. Its totient is φ = 3033377552.

The previous prime is 4576520719. The next prime is 4576520723. The reversal of 4576520721 is 1270256754.

It is an interprime number because it is at equal distance from previous prime (4576520719) and next prime (4576520723).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4576520721 - 2¹ = 4576520719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4576520721.

It is not an unprimeable number, because it can be changed into a prime (4576520723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4408461 + ... + 4409498.

It is an arithmetic number, because the mean of its divisors is an integer number (767162520).

Almost surely, 2^4576520721 is an apocalyptic number.

It is an amenable number.

4576520721 is a deficient number, since it is larger than the sum of its proper divisors (1560779439).

4576520721 is a wasteful number, since it uses less digits than its factorization.

4576520721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8818135.

The product of its (nonzero) digits is 117600, while the sum is 39.

The square root of 4576520721 is about 67649.9868514400. The cubic root of 4576520721 is about 1660.2690715187.

The spelling of 4576520721 in words is "four billion, five hundred seventy-six million, five hundred twenty thousand, seven hundred twenty-one".