4552720272521 has 2 divisors, whose sum is σ = 4552720272522. Its totient is φ = 4552720272520.

The previous prime is 4552720272517. The next prime is 4552720272523. The reversal of 4552720272521 is 1252720272554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4263147138121 + 289573134400 = 2064739^2 + 538120^2 .

It is a cyclic number.

It is not a de Polignac number, because 4552720272521 - 2² = 4552720272517 is a prime.

Together with 4552720272523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4552720272523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2276360136260 + 2276360136261.

It is an arithmetic number, because the mean of its divisors is an integer number (2276360136261).

Almost surely, 2^{4552720272521} is an apocalyptic number.

It is an amenable number.

4552720272521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4552720272521 is an equidigital number, since it uses as much as digits as its factorization.

4552720272521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784000, while the sum is 44.

The spelling of 4552720272521 in words is "four trillion, five hundred fifty-two billion, seven hundred twenty million, two hundred seventy-two thousand, five hundred twenty-one".