3813655871 has 4 divisors (see below), whose sum is σ = 3847405152. Its totient is φ = 3779906592.

The previous prime is 3813655843. The next prime is 3813655891. The reversal of 3813655871 is 1785563183.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3813655871 is a prime.

It is a super-2 number, since 2×3813655871² = 29087942204825537282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813655831) 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, 16874471 + ... + 16874696.

It is an arithmetic number, because the mean of its divisors is an integer number (961851288).

Almost surely, 2^3813655871 is an apocalyptic number.

3813655871 is a deficient number, since it is larger than the sum of its proper divisors (33749281).

3813655871 is a wasteful number, since it uses less digits than its factorization.

3813655871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33749280.

The product of its digits is 604800, while the sum is 47.

The square root of 3813655871 is about 61754.8044365780. The cubic root of 3813655871 is about 1562.3578019799.

The spelling of 3813655871 in words is "three billion, eight hundred thirteen million, six hundred fifty-five thousand, eight hundred seventy-one".