1688969054879 has 4 divisors (see below), whose sum is σ = 1700154280560. Its totient is φ = 1677783829200.

The previous prime is 1688969054849. The next prime is 1688969054897. The reversal of 1688969054879 is 9784509698861.

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 1688969054879 - 2⁸ = 1688969054623 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 (1688969054819) 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, 5592612614 + ... + 5592612915.

It is an arithmetic number, because the mean of its divisors is an integer number (425038570140).

Almost surely, 2^{1688969054879} is an apocalyptic number.

1688969054879 is a deficient number, since it is larger than the sum of its proper divisors (11185225681).

1688969054879 is a wasteful number, since it uses less digits than its factorization.

1688969054879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11185225680.

The product of its (nonzero) digits is 1881169920, while the sum is 80.

The spelling of 1688969054879 in words is "one trillion, six hundred eighty-eight billion, nine hundred sixty-nine million, fifty-four thousand, eight hundred seventy-nine".