3861823424591 has 48 divisors (see below), whose sum is σ = 4373907177024. Its totient is φ = 3405832320000.

The previous prime is 3861823424539. The next prime is 3861823424593. The reversal of 3861823424591 is 1954243281683.

It is not a de Polignac number, because 3861823424591 - 2²⁶ = 3861756315727 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861823424593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 196051655 + ... + 196071351.

It is an arithmetic number, because the mean of its divisors is an integer number (91123066188).

Almost surely, 2^{3861823424591} is an apocalyptic number.

3861823424591 is a deficient number, since it is larger than the sum of its proper divisors (512083752433).

3861823424591 is a wasteful number, since it uses less digits than its factorization.

3861823424591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20144 (or 20133 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 56.

The spelling of 3861823424591 in words is "three trillion, eight hundred sixty-one billion, eight hundred twenty-three million, four hundred twenty-four thousand, five hundred ninety-one".