65697268420909 has 2 divisors, whose sum is σ = 65697268420910. Its totient is φ = 65697268420908.

The previous prime is 65697268420853. The next prime is 65697268421011. The reversal of 65697268420909 is 90902486279656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63316681723684 + 2380586697225 = 7957178^2 + 1542915^2 .

It is a cyclic number.

It is not a de Polignac number, because 65697268420909 - 2¹³ = 65697268412717 is a prime.

It is a super-2 number, since 2×65697268420909² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65697268420309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32848634210454 + 32848634210455.

It is an arithmetic number, because the mean of its divisors is an integer number (32848634210455).

Almost surely, 2^{65697268420909} is an apocalyptic number.

It is an amenable number.

65697268420909 is a deficient number, since it is larger than the sum of its proper divisors (1).

65697268420909 is an equidigital number, since it uses as much as digits as its factorization.

65697268420909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705438720, while the sum is 73.

The spelling of 65697268420909 in words is "sixty-five trillion, six hundred ninety-seven billion, two hundred sixty-eight million, four hundred twenty thousand, nine hundred nine".