82615247549 has 2 divisors, whose sum is σ = 82615247550. Its totient is φ = 82615247548.

The previous prime is 82615247501. The next prime is 82615247557. The reversal of 82615247549 is 94574251628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54695176900 + 27920070649 = 233870^2 + 167093^2 .

It is a cyclic number.

It is not a de Polignac number, because 82615247549 - 2³⁶ = 13895770813 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 82615247549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82615243549) 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, 41307623774 + 41307623775.

It is an arithmetic number, because the mean of its divisors is an integer number (41307623775).

Almost surely, 2^82615247549 is an apocalyptic number.

It is an amenable number.

82615247549 is a deficient number, since it is larger than the sum of its proper divisors (1).

82615247549 is an equidigital number, since it uses as much as digits as its factorization.

82615247549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 53.

The spelling of 82615247549 in words is "eighty-two billion, six hundred fifteen million, two hundred forty-seven thousand, five hundred forty-nine".