4541721689 has 4 divisors (see below), whose sum is σ = 4542525156. Its totient is φ = 4540918224.

The previous prime is 4541721671. The next prime is 4541721707. The reversal of 4541721689 is 9861271454.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9861271454 = 2 ⋅4930635727.

It is an interprime number because it is at equal distance from previous prime (4541721671) and next prime (4541721707).

It can be written as a sum of positive squares in 2 ways, for example, as 2980286464 + 1561435225 = 54592^2 + 39515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4541721689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4541721089) 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, 393194 + ... + 404579.

It is an arithmetic number, because the mean of its divisors is an integer number (1135631289).

Almost surely, 2^4541721689 is an apocalyptic number.

It is an amenable number.

4541721689 is a deficient number, since it is larger than the sum of its proper divisors (803467).

4541721689 is an equidigital number, since it uses as much as digits as its factorization.

4541721689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803466.

The product of its digits is 483840, while the sum is 47.

The square root of 4541721689 is about 67392.2969559578. The cubic root of 4541721689 is about 1656.0502321700.

The spelling of 4541721689 in words is "four billion, five hundred forty-one million, seven hundred twenty-one thousand, six hundred eighty-nine".