4553208721 has 2 divisors, whose sum is σ = 4553208722. Its totient is φ = 4553208720.

The previous prime is 4553208703. The next prime is 4553208727. The reversal of 4553208721 is 1278023554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4518528400 + 34680321 = 67220^2 + 5889^2 .

It is a cyclic number.

It is not a de Polignac number, because 4553208721 - 2⁵ = 4553208689 is a prime.

It is not a weakly prime, because it can be changed into another prime (4553208727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2276604360 + 2276604361.

It is an arithmetic number, because the mean of its divisors is an integer number (2276604361).

Almost surely, 2^4553208721 is an apocalyptic number.

It is an amenable number.

4553208721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4553208721 is an equidigital number, since it uses as much as digits as its factorization.

4553208721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 4553208721 is about 67477.4682468155. The cubic root of 4553208721 is about 1657.4452308007.

The spelling of 4553208721 in words is "four billion, five hundred fifty-three million, two hundred eight thousand, seven hundred twenty-one".