82123261049 has 2 divisors, whose sum is σ = 82123261050. Its totient is φ = 82123261048.

The previous prime is 82123261039. The next prime is 82123261097. The reversal of 82123261049 is 94016232128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76857581824 + 5265679225 = 277232^2 + 72565^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82123261049 is a prime.

It is not a weakly prime, because it can be changed into another prime (82123261009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41061630524 + 41061630525.

It is an arithmetic number, because the mean of its divisors is an integer number (41061630525).

Almost surely, 2^82123261049 is an apocalyptic number.

It is an amenable number.

82123261049 is a deficient number, since it is larger than the sum of its proper divisors (1).

82123261049 is an equidigital number, since it uses as much as digits as its factorization.

82123261049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 38.

The spelling of 82123261049 in words is "eighty-two billion, one hundred twenty-three million, two hundred sixty-one thousand, forty-nine".