3618806849 has 6 divisors (see below), whose sum is σ = 4209632514. Its totient is φ = 3101834400.

The previous prime is 3618806819. The next prime is 3618806897. The reversal of 3618806849 is 9486088163.

3618806849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2939266225 + 679540624 = 54215^2 + 26068^2 .

It is not a de Polignac number, because 3618806849 - 2¹² = 3618802753 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3618806849.

It is not an unprimeable number, because it can be changed into a prime (3618806819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36926552 + ... + 36926649.

It is an arithmetic number, because the mean of its divisors is an integer number (701605419).

Almost surely, 2^3618806849 is an apocalyptic number.

It is an amenable number.

3618806849 is a deficient number, since it is larger than the sum of its proper divisors (590825665).

3618806849 is an equidigital number, since it uses as much as digits as its factorization.

3618806849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73853215 (or 73853208 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 53.

The square root of 3618806849 is about 60156.5195884868. The cubic root of 3618806849 is about 1535.2830947696.

The spelling of 3618806849 in words is "three billion, six hundred eighteen million, eight hundred six thousand, eight hundred forty-nine".