4504643681 has 4 divisors (see below), whose sum is σ = 4589637012. Its totient is φ = 4419650352.

The previous prime is 4504643677. The next prime is 4504643711. The reversal of 4504643681 is 1863464054.

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: 1863464054 = 2 ⋅931732027.

It can be written as a sum of positive squares in 2 ways, for example, as 4080654400 + 423989281 = 63880^2 + 20591^2 .

It is a cyclic number.

It is not a de Polignac number, because 4504643681 - 2² = 4504643677 is a prime.

It is a super-2 number, since 2×4504643681² = 40583629385546459522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4504643641) 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, 42496586 + ... + 42496691.

It is an arithmetic number, because the mean of its divisors is an integer number (1147409253).

Almost surely, 2^4504643681 is an apocalyptic number.

It is an amenable number.

4504643681 is a deficient number, since it is larger than the sum of its proper divisors (84993331).

4504643681 is an equidigital number, since it uses as much as digits as its factorization.

4504643681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84993330.

The product of its (nonzero) digits is 276480, while the sum is 41.

The square root of 4504643681 is about 67116.6423549331. The cubic root of 4504643681 is about 1651.5313216928.

The spelling of 4504643681 in words is "four billion, five hundred four million, six hundred forty-three thousand, six hundred eighty-one".