3861440771 has 4 divisors (see below), whose sum is σ = 3861565344. Its totient is φ = 3861316200.

The previous prime is 3861440753. The next prime is 3861440783. The reversal of 3861440771 is 1770441683.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3861440771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3861440071) 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, 24761 + ... + 91301.

It is an arithmetic number, because the mean of its divisors is an integer number (965391336).

Almost surely, 2^3861440771 is an apocalyptic number.

3861440771 is a deficient number, since it is larger than the sum of its proper divisors (124573).

3861440771 is an equidigital number, since it uses as much as digits as its factorization.

3861440771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124572.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 3861440771 is about 62140.4922011405. The cubic root of 3861440771 is about 1568.8561550869.

The spelling of 3861440771 in words is "three billion, eight hundred sixty-one million, four hundred forty thousand, seven hundred seventy-one".