78741381871 has 2 divisors, whose sum is σ = 78741381872. Its totient is φ = 78741381870.

The previous prime is 78741381863. The next prime is 78741381919. The reversal of 78741381871 is 17818314787.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78741381871 - 2³ = 78741381863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78741381821) 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 as a sum of consecutive naturals, namely, 39370690935 + 39370690936.

It is an arithmetic number, because the mean of its divisors is an integer number (39370690936).

Almost surely, 2^78741381871 is an apocalyptic number.

78741381871 is a deficient number, since it is larger than the sum of its proper divisors (1).

78741381871 is an equidigital number, since it uses as much as digits as its factorization.

78741381871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2107392, while the sum is 55.

The spelling of 78741381871 in words is "seventy-eight billion, seven hundred forty-one million, three hundred eighty-one thousand, eight hundred seventy-one".