3445643205 has 20 divisors (see below), whose sum is σ = 6176635212. Its totient is φ = 1837676160.

The previous prime is 3445643203. The next prime is 3445643209. The reversal of 3445643205 is 5023465443.

3445643205 is a `hidden beast` number, since 3 + 4 + 4 + 5 + 643 + 2 + 0 + 5 = 666.

3445643205 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 2 ways, for example, as 2391796836 + 1053846369 = 48906^2 + 32463^2 .

It is not a de Polignac number, because 3445643205 - 2¹ = 3445643203 is a 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 3445643205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3445643203) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4253476 + ... + 4254285.

Almost surely, 2^3445643205 is an apocalyptic number.

It is an amenable number.

3445643205 is a deficient number, since it is larger than the sum of its proper divisors (2730992007).

3445643205 is an equidigital number, since it uses as much as digits as its factorization.

3445643205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8507778 (or 8507769 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

The square root of 3445643205 is about 58699.6014040981. The cubic root of 3445643205 is about 1510.3934774183.

The spelling of 3445643205 in words is "three billion, four hundred forty-five million, six hundred forty-three thousand, two hundred five".