1969125064657 has 2 divisors, whose sum is σ = 1969125064658. Its totient is φ = 1969125064656.

The previous prime is 1969125064631. The next prime is 1969125064717. The reversal of 1969125064657 is 7564605219691.

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., 993289296321 + 975835768336 = 996639^2 + 987844^2 .

It is a cyclic number.

It is not a de Polignac number, because 1969125064657 - 2¹¹ = 1969125062609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1969125064595 and 1969125064604.

It is not a weakly prime, because it can be changed into another prime (1969125004657) 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, 984562532328 + 984562532329.

It is an arithmetic number, because the mean of its divisors is an integer number (984562532329).

Almost surely, 2^{1969125064657} is an apocalyptic number.

It is an amenable number.

1969125064657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1969125064657 is an equidigital number, since it uses as much as digits as its factorization.

1969125064657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 1969125064657 in words is "one trillion, nine hundred sixty-nine billion, one hundred twenty-five million, sixty-four thousand, six hundred fifty-seven".