3820645805 has 8 divisors (see below), whose sum is σ = 4784113152. Its totient is φ = 2923624528.

The previous prime is 3820645783. The next prime is 3820645811. The reversal of 3820645805 is 5085460283.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3820645805 - 2¹⁸ = 3820383661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16611389 + ... + 16611618.

It is an arithmetic number, because the mean of its divisors is an integer number (598014144).

Almost surely, 2^3820645805 is an apocalyptic number.

It is an amenable number.

3820645805 is a deficient number, since it is larger than the sum of its proper divisors (963467347).

3820645805 is a wasteful number, since it uses less digits than its factorization.

3820645805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33223035.

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 3820645805 is about 61811.3727804196. The cubic root of 3820645805 is about 1563.3117521137.

The spelling of 3820645805 in words is "three billion, eight hundred twenty million, six hundred forty-five thousand, eight hundred five".