3878243583791 has 2 divisors, whose sum is σ = 3878243583792. Its totient is φ = 3878243583790.

The previous prime is 3878243583769. The next prime is 3878243583869. The reversal of 3878243583791 is 1973853428783.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3878243583791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3878243580791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939121791895 + 1939121791896.

It is an arithmetic number, because the mean of its divisors is an integer number (1939121791896).

Almost surely, 2^{3878243583791} is an apocalyptic number.

3878243583791 is a deficient number, since it is larger than the sum of its proper divisors (1).

3878243583791 is an equidigital number, since it uses as much as digits as its factorization.

3878243583791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 68.

The spelling of 3878243583791 in words is "three trillion, eight hundred seventy-eight billion, two hundred forty-three million, five hundred eighty-three thousand, seven hundred ninety-one".