1689220684947 has 16 divisors (see below), whose sum is σ = 2345523683328. Its totient is φ = 1080175367040.

The previous prime is 1689220684901. The next prime is 1689220684967. The reversal of 1689220684947 is 7494860229861.

It is not a de Polignac number, because 1689220684947 - 2⁶ = 1689220684883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1689220684967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80359683 + ... + 80380700.

It is an arithmetic number, because the mean of its divisors is an integer number (146595230208).

Almost surely, 2^{1689220684947} is an apocalyptic number.

1689220684947 is a deficient number, since it is larger than the sum of its proper divisors (656302998381).

1689220684947 is a wasteful number, since it uses less digits than its factorization.

1689220684947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160740530.

The product of its (nonzero) digits is 83607552, while the sum is 66.

The spelling of 1689220684947 in words is "one trillion, six hundred eighty-nine billion, two hundred twenty million, six hundred eighty-four thousand, nine hundred forty-seven".