1688712164 has 12 divisors (see below), whose sum is σ = 3083735424. Its totient is φ = 807644904.

The previous prime is 1688712163. The next prime is 1688712167. The reversal of 1688712164 is 4612178861.

It is not an unprimeable number, because it can be changed into a prime (1688712163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9177692 + ... + 9177875.

It is an arithmetic number, because the mean of its divisors is an integer number (256977952).

Almost surely, 2^1688712164 is an apocalyptic number.

It is an amenable number.

1688712164 is a deficient number, since it is larger than the sum of its proper divisors (1395023260).

1688712164 is a wasteful number, since it uses less digits than its factorization.

1688712164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18355594 (or 18355592 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 1688712164 is about 41093.9431546791. The cubic root of 1688712164 is about 1190.8357859932.

The spelling of 1688712164 in words is "one billion, six hundred eighty-eight million, seven hundred twelve thousand, one hundred sixty-four".