3891863811 has 32 divisors (see below), whose sum is σ = 5806080000. Its totient is φ = 2298642080.

The previous prime is 3891863809. The next prime is 3891863851. The reversal of 3891863811 is 1183681983.

3891863811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3891863811 - 2¹ = 3891863809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3891863851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 365440 + ... + 375938.

It is an arithmetic number, because the mean of its divisors is an integer number (181440000).

Almost surely, 2^3891863811 is an apocalyptic number.

3891863811 is a deficient number, since it is larger than the sum of its proper divisors (1914216189).

3891863811 is a wasteful number, since it uses less digits than its factorization.

3891863811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10799.

The product of its digits is 248832, while the sum is 48.

The square root of 3891863811 is about 62384.8043276566. The cubic root of 3891863811 is about 1572.9655513879.

The spelling of 3891863811 in words is "three billion, eight hundred ninety-one million, eight hundred sixty-three thousand, eight hundred eleven".