1650741809869 has 2 divisors, whose sum is σ = 1650741809870. Its totient is φ = 1650741809868.

The previous prime is 1650741809819. The next prime is 1650741809911. The reversal of 1650741809869 is 9689081470561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1168481007369 + 482260802500 = 1080963^2 + 694450^2 .

It is an emirp because it is prime and its reverse (9689081470561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1650741809869 - 2⁷ = 1650741809741 is a prime.

It is a super-2 number, since 2×1650741809869² (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 1650741809869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1650741809819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825370904934 + 825370904935.

It is an arithmetic number, because the mean of its divisors is an integer number (825370904935).

Almost surely, 2^{1650741809869} is an apocalyptic number.

It is an amenable number.

1650741809869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1650741809869 is an equidigital number, since it uses as much as digits as its factorization.

1650741809869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26127360, while the sum is 64.

The spelling of 1650741809869 in words is "one trillion, six hundred fifty billion, seven hundred forty-one million, eight hundred nine thousand, eight hundred sixty-nine".