82380640731509 has 2 divisors, whose sum is σ = 82380640731510. Its totient is φ = 82380640731508.

The previous prime is 82380640731497. The next prime is 82380640731539. The reversal of 82380640731509 is 90513704608328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67046783004100 + 15333857727409 = 8188210^2 + 3915847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82380640731509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82380640731539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41190320365754 + 41190320365755.

It is an arithmetic number, because the mean of its divisors is an integer number (41190320365755).

It is a 1-persistent number, because it is pandigital, but 2⋅82380640731509 = 164761281463018 is not.

Almost surely, 2^{82380640731509} is an apocalyptic number.

It is an amenable number.

82380640731509 is a deficient number, since it is larger than the sum of its proper divisors (1).

82380640731509 is an equidigital number, since it uses as much as digits as its factorization.

82380640731509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 82380640731509 in words is "eighty-two trillion, three hundred eighty billion, six hundred forty million, seven hundred thirty-one thousand, five hundred nine".