4681661863 has 4 divisors (see below), whose sum is σ = 4682562760. Its totient is φ = 4680760968.

The previous prime is 4681661849. The next prime is 4681661867. The reversal of 4681661863 is 3681661864.

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 4681661863 - 2¹³ = 4681653671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4681661867) 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, 442608 + ... + 453061.

It is an arithmetic number, because the mean of its divisors is an integer number (1170640690).

Almost surely, 2^4681661863 is an apocalyptic number.

4681661863 is a deficient number, since it is larger than the sum of its proper divisors (900897).

4681661863 is an equidigital number, since it uses as much as digits as its factorization.

4681661863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900896.

The product of its digits is 995328, while the sum is 49.

The square root of 4681661863 is about 68422.6706801189. The cubic root of 4681661863 is about 1672.8872881068.

Subtracting from 4681661863 its reverse (3681661864), we obtain a palindrome (999999999).

The spelling of 4681661863 in words is "four billion, six hundred eighty-one million, six hundred sixty-one thousand, eight hundred sixty-three".