1686785714440 has 16 divisors (see below), whose sum is σ = 3795267857580. Its totient is φ = 674714285760.

The previous prime is 1686785714437. The next prime is 1686785714489. The reversal of 1686785714440 is 444175876861.

It can be written as a sum of positive squares in 2 ways, for example, as 1678532718724 + 8252995716 = 1295582^2 + 90846^2 .

It is a super-2 number, since 2×1686785714440² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21084821391 + ... + 21084821470.

Almost surely, 2^{1686785714440} is an apocalyptic number.

1686785714440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1686785714440 is an abundant number, since it is smaller than the sum of its proper divisors (2108482143140).

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

1686785714440 is a wasteful number, since it uses less digits than its factorization.

1686785714440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42169642872 (or 42169642868 counting only the distinct ones).

The product of its (nonzero) digits is 36126720, while the sum is 61.

The spelling of 1686785714440 in words is "one trillion, six hundred eighty-six billion, seven hundred eighty-five million, seven hundred fourteen thousand, four hundred forty".