4686821549 has 2 divisors, whose sum is σ = 4686821550. Its totient is φ = 4686821548.

The previous prime is 4686821519. The next prime is 4686821563. The reversal of 4686821549 is 9451286864.

4686821549 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2590097449 + 2096724100 = 50893^2 + 45790^2 .

It is a cyclic number.

It is not a de Polignac number, because 4686821549 - 2¹⁶ = 4686756013 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4686821549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4686821519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2343410774 + 2343410775.

It is an arithmetic number, because the mean of its divisors is an integer number (2343410775).

Almost surely, 2^4686821549 is an apocalyptic number.

It is an amenable number.

4686821549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4686821549 is an equidigital number, since it uses as much as digits as its factorization.

4686821549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3317760, while the sum is 53.

The square root of 4686821549 is about 68460.3648032933. The cubic root of 4686821549 is about 1673.5016286511.

The spelling of 4686821549 in words is "four billion, six hundred eighty-six million, eight hundred twenty-one thousand, five hundred forty-nine".