82705168331 has 2 divisors, whose sum is σ = 82705168332. Its totient is φ = 82705168330.

The previous prime is 82705168327. The next prime is 82705168349. The reversal of 82705168331 is 13386150728.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82705168331 - 2² = 82705168327 is a prime.

It is a super-2 number, since 2×82705168331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82705168321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41352584165 + 41352584166.

It is an arithmetic number, because the mean of its divisors is an integer number (41352584166).

Almost surely, 2^82705168331 is an apocalyptic number.

82705168331 is a deficient number, since it is larger than the sum of its proper divisors (1).

82705168331 is an equidigital number, since it uses as much as digits as its factorization.

82705168331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 82705168331 in words is "eighty-two billion, seven hundred five million, one hundred sixty-eight thousand, three hundred thirty-one".