3845376809 has 4 divisors (see below), whose sum is σ = 3888583380. Its totient is φ = 3802170240.

The previous prime is 3845376793. The next prime is 3845376841. The reversal of 3845376809 is 9086735483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2285126809 + 1560250000 = 47803^2 + 39500^2 .

It is a cyclic number.

It is not a de Polignac number, because 3845376809 - 2⁴ = 3845376793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3845376869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21603152 + ... + 21603329.

It is an arithmetic number, because the mean of its divisors is an integer number (972145845).

Almost surely, 2^3845376809 is an apocalyptic number.

It is an amenable number.

3845376809 is a deficient number, since it is larger than the sum of its proper divisors (43206571).

3845376809 is an equidigital number, since it uses as much as digits as its factorization.

3845376809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43206570.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The square root of 3845376809 is about 62011.1023043455. The cubic root of 3845376809 is about 1566.6776008643.

The spelling of 3845376809 in words is "three billion, eight hundred forty-five million, three hundred seventy-six thousand, eight hundred nine".