1688008816 has 40 divisors (see below), whose sum is σ = 3549883904. Its totient is φ = 772934400.

The previous prime is 1688008789. The next prime is 1688008823. The reversal of 1688008816 is 6188008861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5535 + ... + 58366.

Almost surely, 2^1688008816 is an apocalyptic number.

1688008816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1688008816 is an abundant number, since it is smaller than the sum of its proper divisors (1861875088).

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

1688008816 is a wasteful number, since it uses less digits than its factorization.

1688008816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64049 (or 64043 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 46.

The square root of 1688008816 is about 41085.3844572495. The cubic root of 1688008816 is about 1190.6704354781.

The spelling of 1688008816 in words is "one billion, six hundred eighty-eight million, eight thousand, eight hundred sixteen".