82568923009 has 2 divisors, whose sum is σ = 82568923010. Its totient is φ = 82568923008.

The previous prime is 82568922977. The next prime is 82568923013. The reversal of 82568923009 is 90032986528.

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., 82010640625 + 558282384 = 286375^2 + 23628^2 .

It is a cyclic number.

It is not a de Polignac number, because 82568923009 - 2⁵ = 82568922977 is a prime.

It is a super-2 number, since 2×82568923009² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82568923049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41284461504 + 41284461505.

It is an arithmetic number, because the mean of its divisors is an integer number (41284461505).

Almost surely, 2^82568923009 is an apocalyptic number.

It is an amenable number.

82568923009 is a deficient number, since it is larger than the sum of its proper divisors (1).

82568923009 is an equidigital number, since it uses as much as digits as its factorization.

82568923009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 82568923009 in words is "eighty-two billion, five hundred sixty-eight million, nine hundred twenty-three thousand, nine".