4645603621 has 2 divisors, whose sum is σ = 4645603622. Its totient is φ = 4645603620.

The previous prime is 4645603609. The next prime is 4645603639. The reversal of 4645603621 is 1263065464.

4645603621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4200984225 + 444619396 = 64815^2 + 21086^2 .

It is a cyclic number.

It is not a de Polignac number, because 4645603621 - 2¹¹ = 4645601573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4645603601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322801810 + 2322801811.

It is an arithmetic number, because the mean of its divisors is an integer number (2322801811).

Almost surely, 2^4645603621 is an apocalyptic number.

It is an amenable number.

4645603621 is a deficient number, since it is larger than the sum of its proper divisors (1).

4645603621 is an equidigital number, since it uses as much as digits as its factorization.

4645603621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 4645603621 is about 68158.6650470797. The cubic root of 4645603621 is about 1668.5813451925.

The spelling of 4645603621 in words is "four billion, six hundred forty-five million, six hundred three thousand, six hundred twenty-one".