4556651621 has 8 divisors (see below), whose sum is σ = 4576959744. Its totient is φ = 4536388800.

The previous prime is 4556651609. The next prime is 4556651623. The reversal of 4556651621 is 1261566554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4556651621 - 2¹⁰ = 4556650597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4556651623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198860 + ... + 220586.

It is an arithmetic number, because the mean of its divisors is an integer number (572119968).

Almost surely, 2^4556651621 is an apocalyptic number.

It is an amenable number.

4556651621 is a deficient number, since it is larger than the sum of its proper divisors (20308123).

4556651621 is a wasteful number, since it uses less digits than its factorization.

4556651621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22651.

The product of its digits is 216000, while the sum is 41.

The square root of 4556651621 is about 67502.9749048144. The cubic root of 4556651621 is about 1657.8628835550.

The spelling of 4556651621 in words is "four billion, five hundred fifty-six million, six hundred fifty-one thousand, six hundred twenty-one".