4643616621 has 16 divisors (see below), whose sum is σ = 7175651328. Its totient is φ = 2616121200.

The previous prime is 4643616613. The next prime is 4643616629. The reversal of 4643616621 is 1266163464.

It is an interprime number because it is at equal distance from previous prime (4643616613) and next prime (4643616629).

It is not a de Polignac number, because 4643616621 - 2³ = 4643616613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4643616621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4643616629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1555725 + ... + 1558706.

It is an arithmetic number, because the mean of its divisors is an integer number (448478208).

Almost surely, 2^4643616621 is an apocalyptic number.

It is an amenable number.

4643616621 is a deficient number, since it is larger than the sum of its proper divisors (2532034707).

4643616621 is a wasteful number, since it uses less digits than its factorization.

4643616621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3114512.

The product of its digits is 124416, while the sum is 39.

The square root of 4643616621 is about 68144.0872049806. The cubic root of 4643616621 is about 1668.3434181681.

The spelling of 4643616621 in words is "four billion, six hundred forty-three million, six hundred sixteen thousand, six hundred twenty-one".