3871855601 has 4 divisors (see below), whose sum is σ = 3879462900. Its totient is φ = 3864248304.

The previous prime is 3871855591. The next prime is 3871855607. The reversal of 3871855601 is 1065581783.

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 3672481201 + 199374400 = 60601^2 + 14120^2 .

It is a cyclic number.

It is not a de Polignac number, because 3871855601 - 2²² = 3867661297 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 (3871855607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3802886 + ... + 3803903.

It is an arithmetic number, because the mean of its divisors is an integer number (969865725).

Almost surely, 2^3871855601 is an apocalyptic number.

It is an amenable number.

3871855601 is a deficient number, since it is larger than the sum of its proper divisors (7607299).

3871855601 is an equidigital number, since it uses as much as digits as its factorization.

3871855601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7607298.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 3871855601 is about 62224.2364436881. The cubic root of 3871855601 is about 1570.2653615858.

The spelling of 3871855601 in words is "three billion, eight hundred seventy-one million, eight hundred fifty-five thousand, six hundred one".