1688704211660 has 12 divisors (see below), whose sum is σ = 3546278844528. Its totient is φ = 675481684656.

The previous prime is 1688704211659. The next prime is 1688704211693. The reversal of 1688704211660 is 661124078861.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1688704211599 and 1688704211608.

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, 42217605272 + ... + 42217605311.

It is an arithmetic number, because the mean of its divisors is an integer number (295523237044).

Almost surely, 2^{1688704211660} is an apocalyptic number.

1688704211660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1688704211660 is an abundant number, since it is smaller than the sum of its proper divisors (1857574632868).

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

1688704211660 is a wasteful number, since it uses less digits than its factorization.

1688704211660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84435210592 (or 84435210590 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 1688704211660 in words is "one trillion, six hundred eighty-eight billion, seven hundred four million, two hundred eleven thousand, six hundred sixty".