1686707769069 has 6 divisors (see below), whose sum is σ = 2436355666446. Its totient is φ = 1124471846040.

The previous prime is 1686707769067. The next prime is 1686707769079. The reversal of 1686707769069 is 9609677076861.

It can be written as a sum of positive squares in only one way, i.e., 1416130940169 + 270576828900 = 1190013^2 + 520170^2 .

It is not a de Polignac number, because 1686707769069 - 2¹ = 1686707769067 is a prime.

It is a super-2 number, since 2×1686707769069² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1686707768988 and 1686707769006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686707769067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93705987162 + ... + 93705987179.

It is an arithmetic number, because the mean of its divisors is an integer number (406059277741).

Almost surely, 2^{1686707769069} is an apocalyptic number.

It is an amenable number.

1686707769069 is a deficient number, since it is larger than the sum of its proper divisors (749647897377).

1686707769069 is a wasteful number, since it uses less digits than its factorization.

1686707769069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187411974347 (or 187411974344 counting only the distinct ones).

The product of its (nonzero) digits is 288054144, while the sum is 72.

The spelling of 1686707769069 in words is "one trillion, six hundred eighty-six billion, seven hundred seven million, seven hundred sixty-nine thousand, sixty-nine".