82378952449 has 2 divisors, whose sum is σ = 82378952450. Its totient is φ = 82378952448.

The previous prime is 82378952407. The next prime is 82378952483. The reversal of 82378952449 is 94425987328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78866612224 + 3512340225 = 280832^2 + 59265^2 .

It is a cyclic number.

It is not a de Polignac number, because 82378952449 - 2⁷ = 82378952321 is a prime.

It is not a weakly prime, because it can be changed into another prime (82378952849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41189476224 + 41189476225.

It is an arithmetic number, because the mean of its divisors is an integer number (41189476225).

Almost surely, 2^82378952449 is an apocalyptic number.

It is an amenable number.

82378952449 is a deficient number, since it is larger than the sum of its proper divisors (1).

82378952449 is an equidigital number, since it uses as much as digits as its factorization.

82378952449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34836480, while the sum is 61.

The spelling of 82378952449 in words is "eighty-two billion, three hundred seventy-eight million, nine hundred fifty-two thousand, four hundred forty-nine".