1688117693342 has 4 divisors (see below), whose sum is σ = 2532176540016.
Its totient is φ = 844058846670.
The previous prime is 1688117693279. The next prime is 1688117693389. The reversal of 1688117693342 is 2433967118861.
It is a semiprime because it is the product of two primes.
It is a super-2 number, since 2×16881176933422 (a number of 25 digits) contains 22 as substring.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422029423334 + ... + 422029423337.
It is an arithmetic number, because the mean of its divisors is an integer number (633044135004).
Almost surely, 21688117693342 is an apocalyptic number.
1688117693342 is a deficient number, since it is larger than the sum of its proper divisors (844058846674).
1688117693342 is an equidigital number, since it uses as much as digits as its factorization.
1688117693342 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 844058846673.
The product of its digits is 10450944, while the sum is 59.
The spelling of 1688117693342 in words is "one trillion, six hundred eighty-eight billion, one hundred seventeen million, six hundred ninety-three thousand, three hundred forty-two".