4581981845 has 16 divisors (see below), whose sum is σ = 6284971008. Its totient is φ = 3141375360.

The previous prime is 4581981821. The next prime is 4581981871. The reversal of 4581981845 is 5481891854.

It is a de Polignac number, because none of the positive numbers 2^k-4581981845 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 339425 + ... + 352665.

It is an arithmetic number, because the mean of its divisors is an integer number (392810688).

Almost surely, 2^4581981845 is an apocalyptic number.

It is an amenable number.

4581981845 is a deficient number, since it is larger than the sum of its proper divisors (1702989163).

4581981845 is a wasteful number, since it uses less digits than its factorization.

4581981845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23140.

The product of its digits is 1843200, while the sum is 53.

The square root of 4581981845 is about 67690.3378998805. The cubic root of 4581981845 is about 1660.9292040892.

The spelling of 4581981845 in words is "four billion, five hundred eighty-one million, nine hundred eighty-one thousand, eight hundred forty-five".