696844717561 has 2 divisors, whose sum is σ = 696844717562. Its totient is φ = 696844717560.

The previous prime is 696844717559. The next prime is 696844717579. The reversal of 696844717561 is 165717448696.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 626086057536 + 70758660025 = 791256^2 + 266005^2 .

It is a cyclic number.

It is not a de Polignac number, because 696844717561 - 2¹ = 696844717559 is a prime.

Together with 696844717559, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 696844717493 and 696844717502.

It is not a weakly prime, because it can be changed into another prime (696844717531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 348422358780 + 348422358781.

It is an arithmetic number, because the mean of its divisors is an integer number (348422358781).

Almost surely, 2^696844717561 is an apocalyptic number.

It is an amenable number.

696844717561 is a deficient number, since it is larger than the sum of its proper divisors (1).

696844717561 is an equidigital number, since it uses as much as digits as its factorization.

696844717561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60963840, while the sum is 64.

The spelling of 696844717561 in words is "six hundred ninety-six billion, eight hundred forty-four million, seven hundred seventeen thousand, five hundred sixty-one".