82378711813 has 2 divisors, whose sum is σ = 82378711814. Its totient is φ = 82378711812.

The previous prime is 82378711763. The next prime is 82378711823. The reversal of 82378711813 is 31811787328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65013270529 + 17365441284 = 254977^2 + 131778^2 .

It is a cyclic number.

It is not a de Polignac number, because 82378711813 - 2¹⁷ = 82378580741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82378711823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41189355906 + 41189355907.

It is an arithmetic number, because the mean of its divisors is an integer number (41189355907).

Almost surely, 2^82378711813 is an apocalyptic number.

It is an amenable number.

82378711813 is a deficient number, since it is larger than the sum of its proper divisors (1).

82378711813 is an equidigital number, since it uses as much as digits as its factorization.

82378711813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 49.

The spelling of 82378711813 in words is "eighty-two billion, three hundred seventy-eight million, seven hundred eleven thousand, eight hundred thirteen".