3845904703205 has 8 divisors (see below), whose sum is σ = 4615473635352. Its totient is φ = 3076465101568.

The previous prime is 3845904703187. The next prime is 3845904703213. The reversal of 3845904703205 is 5023074095483.

It can be written as a sum of positive squares in 4 ways, for example, as 2562054812164 + 1283849891041 = 1600642^2 + 1133071^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3845904703205 is a prime.

It is a super-2 number, since 2×3845904703205² (a number of 26 digits) contains 22 as substring.

It is a Duffinian 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, 32267192 + ... + 32386161.

It is an arithmetic number, because the mean of its divisors is an integer number (576934204419).

Almost surely, 2^{3845904703205} is an apocalyptic number.

It is an amenable number.

3845904703205 is a deficient number, since it is larger than the sum of its proper divisors (769568932147).

3845904703205 is a wasteful number, since it uses less digits than its factorization.

3845904703205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64665255.

The product of its (nonzero) digits is 3628800, while the sum is 50.

Adding to 3845904703205 its reverse (5023074095483), we get a palindrome (8868978798688).

The spelling of 3845904703205 in words is "three trillion, eight hundred forty-five billion, nine hundred four million, seven hundred three thousand, two hundred five".