1688404667683 has 4 divisors (see below), whose sum is σ = 1690042306608. Its totient is φ = 1686767028760.

The previous prime is 1688404667581. The next prime is 1688404667687. The reversal of 1688404667683 is 3867664048861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1688404667683 - 2⁹ = 1688404667171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688404667687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818817916 + ... + 818819977.

It is an arithmetic number, because the mean of its divisors is an integer number (422510576652).

Almost surely, 2^{1688404667683} is an apocalyptic number.

1688404667683 is a deficient number, since it is larger than the sum of its proper divisors (1637638925).

1688404667683 is a wasteful number, since it uses less digits than its factorization.

1688404667683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637638924.

The product of its (nonzero) digits is 222953472, while the sum is 67.

The spelling of 1688404667683 in words is "one trillion, six hundred eighty-eight billion, four hundred four million, six hundred sixty-seven thousand, six hundred eighty-three".