4368755621 has 2 divisors, whose sum is σ = 4368755622. Its totient is φ = 4368755620.

The previous prime is 4368755459. The next prime is 4368755623. The reversal of 4368755621 is 1265578634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3873693121 + 495062500 = 62239^2 + 22250^2 .

It is a cyclic number.

It is not a de Polignac number, because 4368755621 - 2²⁶ = 4301646757 is a prime.

Together with 4368755623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4368755623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2184377810 + 2184377811.

It is an arithmetic number, because the mean of its divisors is an integer number (2184377811).

Almost surely, 2^4368755621 is an apocalyptic number.

It is an amenable number.

4368755621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4368755621 is an equidigital number, since it uses as much as digits as its factorization.

4368755621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1209600, while the sum is 47.

The square root of 4368755621 is about 66096.5628531469. The cubic root of 4368755621 is about 1634.7546597304.

The spelling of 4368755621 in words is "four billion, three hundred sixty-eight million, seven hundred fifty-five thousand, six hundred twenty-one".