2197644697769 has 2 divisors, whose sum is σ = 2197644697770. Its totient is φ = 2197644697768.

The previous prime is 2197644697739. The next prime is 2197644697811. The reversal of 2197644697769 is 9677964467912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1839278440000 + 358366257769 = 1356200^2 + 598637^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197644697769 - 2⁸ = 2197644697513 is a prime.

It is a super-2 number, since 2×2197644697769² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2197644697769.

It is not a weakly prime, because it can be changed into another prime (2197644697709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098822348884 + 1098822348885.

It is an arithmetic number, because the mean of its divisors is an integer number (1098822348885).

Almost surely, 2^{2197644697769} is an apocalyptic number.

It is an amenable number.

2197644697769 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197644697769 is an equidigital number, since it uses as much as digits as its factorization.

2197644697769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728324864, while the sum is 77.

The spelling of 2197644697769 in words is "two trillion, one hundred ninety-seven billion, six hundred forty-four million, six hundred ninety-seven thousand, seven hundred sixty-nine".