4520081999 has 4 divisors (see below), whose sum is σ = 4562325864. Its totient is φ = 4477838136.

The previous prime is 4520081989. The next prime is 4520082011. The reversal of 4520081999 is 9991800254.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4520081999 - 2⁸ = 4520081743 is a prime.

It is a super-2 number, since 2×4520081999² = 40862282555367672002, 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 (4520081959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21121772 + ... + 21121985.

It is an arithmetic number, because the mean of its divisors is an integer number (1140581466).

Almost surely, 2^4520081999 is an apocalyptic number.

4520081999 is a deficient number, since it is larger than the sum of its proper divisors (42243865).

4520081999 is a wasteful number, since it uses less digits than its factorization.

4520081999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42243864.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 4520081999 is about 67231.5550839039. Note that the first 3 decimals coincide. The cubic root of 4520081999 is about 1653.4158801797.

The spelling of 4520081999 in words is "four billion, five hundred twenty million, eighty-one thousand, nine hundred ninety-nine".