1688633645017 has 4 divisors (see below), whose sum is σ = 1842145794576. Its totient is φ = 1535121495460.

The previous prime is 1688633644979. The next prime is 1688633645021. The reversal of 1688633645017 is 7105463368861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1688633645017 - 2²⁷ = 1688499427289 is a prime.

It is a super-3 number, since 3×1688633645017³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688633645417) 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, 76756074763 + ... + 76756074784.

It is an arithmetic number, because the mean of its divisors is an integer number (460536448644).

Almost surely, 2^{1688633645017} is an apocalyptic number.

It is an amenable number.

1688633645017 is a deficient number, since it is larger than the sum of its proper divisors (153512149559).

1688633645017 is a wasteful number, since it uses less digits than its factorization.

1688633645017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153512149558.

The product of its (nonzero) digits is 17418240, while the sum is 58.

The spelling of 1688633645017 in words is "one trillion, six hundred eighty-eight billion, six hundred thirty-three million, six hundred forty-five thousand, seventeen".