695389209961 has 2 divisors, whose sum is σ = 695389209962. Its totient is φ = 695389209960.

The previous prime is 695389209947. The next prime is 695389210003. The reversal of 695389209961 is 169902983596.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411337518736 + 284051691225 = 641356^2 + 532965^2 .

It is a cyclic number.

It is not a de Polignac number, because 695389209961 - 2⁵ = 695389209929 is a prime.

It is not a weakly prime, because it can be changed into another prime (695389209941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347694604980 + 347694604981.

It is an arithmetic number, because the mean of its divisors is an integer number (347694604981).

Almost surely, 2^695389209961 is an apocalyptic number.

It is an amenable number.

695389209961 is a deficient number, since it is larger than the sum of its proper divisors (1).

695389209961 is an equidigital number, since it uses as much as digits as its factorization.

695389209961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56687040, while the sum is 67.

The spelling of 695389209961 in words is "six hundred ninety-five billion, three hundred eighty-nine million, two hundred nine thousand, nine hundred sixty-one".