1686707769068 has 72 divisors (see below), whose sum is σ = 3456588582720. Its totient is φ = 718062589440.

The previous prime is 1686707769067. The next prime is 1686707769079. The reversal of 1686707769068 is 8609677076861.

It is a junction number, because it is equal to n+sod(n) for n = 1686707768992 and 1686707769010.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17852978 + ... + 17947206.

It is an arithmetic number, because the mean of its divisors is an integer number (48008174760).

Almost surely, 2^{1686707769068} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1686707769068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728294291360).

1686707769068 is an abundant number, since it is smaller than the sum of its proper divisors (1769880813652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1686707769068 is a wasteful number, since it uses less digits than its factorization.

1686707769068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94855 (or 94846 counting only the distinct ones).

The product of its (nonzero) digits is 256048128, while the sum is 71.

The spelling of 1686707769068 in words is "one trillion, six hundred eighty-six billion, seven hundred seven million, seven hundred sixty-nine thousand, sixty-eight".