1686471380608 has 128 divisors (see below), whose sum is σ = 3944905977600. Its totient is φ = 702990213120.

The previous prime is 1686471380597. The next prime is 1686471380639. The reversal of 1686471380608 is 8060831746861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116389428 + ... + 116403916.

It is an arithmetic number, because the mean of its divisors is an integer number (30819577950).

Almost surely, 2^{1686471380608} 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 1686471380608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1972452988800).

1686471380608 is an abundant number, since it is smaller than the sum of its proper divisors (2258434596992).

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

1686471380608 is a wasteful number, since it uses less digits than its factorization.

1686471380608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18058 (or 18046 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 1686471380608 in words is "one trillion, six hundred eighty-six billion, four hundred seventy-one million, three hundred eighty thousand, six hundred eight".