82357664261 has 2 divisors, whose sum is σ = 82357664262. Its totient is φ = 82357664260.

The previous prime is 82357664239. The next prime is 82357664281. The reversal of 82357664261 is 16246675328.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66618707236 + 15738957025 = 258106^2 + 125455^2 .

It is a cyclic number.

It is not a de Polignac number, because 82357664261 - 2¹⁰ = 82357663237 is a prime.

It is a super-2 number, since 2×82357664261² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82357664201) 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, 41178832130 + 41178832131.

It is an arithmetic number, because the mean of its divisors is an integer number (41178832131).

Almost surely, 2^82357664261 is an apocalyptic number.

It is an amenable number.

82357664261 is a deficient number, since it is larger than the sum of its proper divisors (1).

82357664261 is an equidigital number, since it uses as much as digits as its factorization.

82357664261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 50.

The spelling of 82357664261 in words is "eighty-two billion, three hundred fifty-seven million, six hundred sixty-four thousand, two hundred sixty-one".