82438243457 has 2 divisors, whose sum is σ = 82438243458. Its totient is φ = 82438243456.

The previous prime is 82438243439. The next prime is 82438243493. The reversal of 82438243457 is 75434283428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80951061361 + 1487182096 = 284519^2 + 38564^2 .

It is a cyclic number.

It is not a de Polignac number, because 82438243457 - 2¹⁴ = 82438227073 is a prime.

It is not a weakly prime, because it can be changed into another prime (82438243057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41219121728 + 41219121729.

It is an arithmetic number, because the mean of its divisors is an integer number (41219121729).

Almost surely, 2^82438243457 is an apocalyptic number.

It is an amenable number.

82438243457 is a deficient number, since it is larger than the sum of its proper divisors (1).

82438243457 is an equidigital number, since it uses as much as digits as its factorization.

82438243457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5160960, while the sum is 50.

The spelling of 82438243457 in words is "eighty-two billion, four hundred thirty-eight million, two hundred forty-three thousand, four hundred fifty-seven".