1688285039797 has 4 divisors (see below), whose sum is σ = 1688321137216. Its totient is φ = 1688248942380.

The previous prime is 1688285039767. The next prime is 1688285039803. The reversal of 1688285039797 is 7979305828861.

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 1688285039797 - 2¹⁹ = 1688284515509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1688285039767) 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, 17978463 + ... + 18072124.

It is an arithmetic number, because the mean of its divisors is an integer number (422080284304).

Almost surely, 2^{1688285039797} is an apocalyptic number.

It is an amenable number.

1688285039797 is a deficient number, since it is larger than the sum of its proper divisors (36097419).

1688285039797 is an equidigital number, since it uses as much as digits as its factorization.

1688285039797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36097418.

The product of its (nonzero) digits is 365783040, while the sum is 73.

The spelling of 1688285039797 in words is "one trillion, six hundred eighty-eight billion, two hundred eighty-five million, thirty-nine thousand, seven hundred ninety-seven".