82776754391 has 2 divisors, whose sum is σ = 82776754392. Its totient is φ = 82776754390.

The previous prime is 82776754321. The next prime is 82776754397. The reversal of 82776754391 is 19345767728.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82776754391 - 2²⁶ = 82709645527 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82776754391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82776754397) 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, 41388377195 + 41388377196.

It is an arithmetic number, because the mean of its divisors is an integer number (41388377196).

Almost surely, 2^82776754391 is an apocalyptic number.

82776754391 is a deficient number, since it is larger than the sum of its proper divisors (1).

82776754391 is an equidigital number, since it uses as much as digits as its factorization.

82776754391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 59.

The spelling of 82776754391 in words is "eighty-two billion, seven hundred seventy-six million, seven hundred fifty-four thousand, three hundred ninety-one".