3865405801 has 4 divisors (see below), whose sum is σ = 3867792004. Its totient is φ = 3863019600.

The previous prime is 3865405793. The next prime is 3865405807. The reversal of 3865405801 is 1085045683.

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 3315456400 + 549949401 = 57580^2 + 23451^2 .

It is a cyclic number.

It is not a de Polignac number, because 3865405801 - 2³ = 3865405793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3865405807) 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, 1190670 + ... + 1193911.

It is an arithmetic number, because the mean of its divisors is an integer number (966948001).

Almost surely, 2^3865405801 is an apocalyptic number.

It is an amenable number.

3865405801 is a deficient number, since it is larger than the sum of its proper divisors (2386203).

3865405801 is a wasteful number, since it uses less digits than its factorization.

3865405801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2386202.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 3865405801 is about 62172.3877698131. The cubic root of 3865405801 is about 1569.3929524601.

The spelling of 3865405801 in words is "three billion, eight hundred sixty-five million, four hundred five thousand, eight hundred one".