1688808808816 has 20 divisors (see below), whose sum is σ = 3272312268432. Its totient is φ = 844341126656.

The previous prime is 1688808808801. The next prime is 1688808808859. The reversal of 1688808808816 is 6188088088861.

It is a congruent number.

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, 3734305 + ... + 4162048.

Almost surely, 2^{1688808808816} is an apocalyptic number.

1688808808816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1688808808816 is a deficient number, since it is larger than the sum of its proper divisors (1583503459616).

1688808808816 is a wasteful number, since it uses less digits than its factorization.

1688808808816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909728 (or 7909722 counting only the distinct ones).

The product of its (nonzero) digits is 75497472, while the sum is 70.

The spelling of 1688808808816 in words is "one trillion, six hundred eighty-eight billion, eight hundred eight million, eight hundred eight thousand, eight hundred sixteen".