4323668581 has 4 divisors (see below), whose sum is σ = 4324970700. Its totient is φ = 4322366464.

The previous prime is 4323668543. The next prime is 4323668627. The reversal of 4323668581 is 1858663234.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1858663234 = 2 ⋅929331617.

It can be written as a sum of positive squares in 2 ways, for example, as 698544900 + 3625123681 = 26430^2 + 60209^2 .

It is a cyclic number.

It is not a de Polignac number, because 4323668581 - 2¹¹ = 4323666533 is a prime.

It is a super-2 number, since 2×4323668581² = 37388219996653107122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4323668081) 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, 646066 + ... + 652723.

It is an arithmetic number, because the mean of its divisors is an integer number (1081242675).

Almost surely, 2^4323668581 is an apocalyptic number.

It is an amenable number.

4323668581 is a deficient number, since it is larger than the sum of its proper divisors (1302119).

4323668581 is a wasteful number, since it uses less digits than its factorization.

4323668581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302118.

The product of its digits is 829440, while the sum is 46.

The square root of 4323668581 is about 65754.6088194584. The cubic root of 4323668581 is about 1629.1114608551. Note that the first 3 decimals are identical.

The spelling of 4323668581 in words is "four billion, three hundred twenty-three million, six hundred sixty-eight thousand, five hundred eighty-one".