4644621060221 has 4 divisors (see below), whose sum is σ = 4650805642944. Its totient is φ = 4638436477500.

The previous prime is 4644621060173. The next prime is 4644621060229. The reversal of 4644621060221 is 1220601264464.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4644621060221 is a prime.

It is a super-2 number, since 2×4644621060221² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4644621060229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3092290235 + ... + 3092291736.

It is an arithmetic number, because the mean of its divisors is an integer number (1162701410736).

Almost surely, 2^{4644621060221} is an apocalyptic number.

It is an amenable number.

4644621060221 is a deficient number, since it is larger than the sum of its proper divisors (6184582723).

4644621060221 is an equidigital number, since it uses as much as digits as its factorization.

4644621060221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6184582722.

The product of its (nonzero) digits is 110592, while the sum is 38.

The spelling of 4644621060221 in words is "four trillion, six hundred forty-four billion, six hundred twenty-one million, sixty thousand, two hundred twenty-one".