82506450791 has 2 divisors, whose sum is σ = 82506450792. Its totient is φ = 82506450790.

The previous prime is 82506450751. The next prime is 82506450821. The reversal of 82506450791 is 19705460528.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82506450791 - 2¹⁸ = 82506188647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82506450751) 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, 41253225395 + 41253225396.

It is an arithmetic number, because the mean of its divisors is an integer number (41253225396).

Almost surely, 2^82506450791 is an apocalyptic number.

82506450791 is a deficient number, since it is larger than the sum of its proper divisors (1).

82506450791 is an equidigital number, since it uses as much as digits as its factorization.

82506450791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 47.

The spelling of 82506450791 in words is "eighty-two billion, five hundred six million, four hundred fifty thousand, seven hundred ninety-one".