8425091667869 has 2 divisors, whose sum is σ = 8425091667870. Its totient is φ = 8425091667868.

The previous prime is 8425091667859. The next prime is 8425091667877. The reversal of 8425091667869 is 9687661905248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8043105865369 + 381985802500 = 2836037^2 + 618050^2 .

It is a cyclic number.

It is not a de Polignac number, because 8425091667869 - 2¹² = 8425091663773 is a prime.

It is a super-2 number, since 2×8425091667869² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8425091667859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212545833934 + 4212545833935.

It is an arithmetic number, because the mean of its divisors is an integer number (4212545833935).

Almost surely, 2^{8425091667869} is an apocalyptic number.

It is an amenable number.

8425091667869 is a deficient number, since it is larger than the sum of its proper divisors (1).

8425091667869 is an equidigital number, since it uses as much as digits as its factorization.

8425091667869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 313528320, while the sum is 71.

The spelling of 8425091667869 in words is "eight trillion, four hundred twenty-five billion, ninety-one million, six hundred sixty-seven thousand, eight hundred sixty-nine".