682236202991561 has 2 divisors, whose sum is σ = 682236202991562. Its totient is φ = 682236202991560.

The previous prime is 682236202991461. The next prime is 682236202991663. The reversal of 682236202991561 is 165199202632286.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363784326143161 + 318451876848400 = 19073131^2 + 17845220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-682236202991561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 682236202991494 and 682236202991503.

It is not a weakly prime, because it can be changed into another prime (682236202991461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341118101495780 + 341118101495781.

It is an arithmetic number, because the mean of its divisors is an integer number (341118101495781).

Almost surely, 2^{682236202991561} is an apocalyptic number.

It is an amenable number.

682236202991561 is a deficient number, since it is larger than the sum of its proper divisors (1).

682236202991561 is an equidigital number, since it uses as much as digits as its factorization.

682236202991561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33592320, while the sum is 62.

The spelling of 682236202991561 in words is "six hundred eighty-two trillion, two hundred thirty-six billion, two hundred two million, nine hundred ninety-one thousand, five hundred sixty-one".