1686684840344 has 32 divisors (see below), whose sum is σ = 3614385991680. Its totient is φ = 722852664864.

The previous prime is 1686684840331. The next prime is 1686684840349. The reversal of 1686684840344 is 4430484866861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686684840349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3584579 + ... + 4027725.

It is an arithmetic number, because the mean of its divisors is an integer number (112949562240).

Almost surely, 2^{1686684840344} is an apocalyptic number.

1686684840344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1686684840344 is an abundant number, since it is smaller than the sum of its proper divisors (1927701151336).

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

1686684840344 is a wasteful number, since it uses less digits than its factorization.

1686684840344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511127 (or 511123 counting only the distinct ones).

The product of its (nonzero) digits is 84934656, while the sum is 62.

The spelling of 1686684840344 in words is "one trillion, six hundred eighty-six billion, six hundred eighty-four million, eight hundred forty thousand, three hundred forty-four".