1689390078773 has 8 divisors (see below), whose sum is σ = 1690383199680. Its totient is φ = 1688397105600.

The previous prime is 1689390078763. The next prime is 1689390078797. The reversal of 1689390078773 is 3778700939861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1689390078773 - 2¹⁶ = 1689390013237 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 (1689390078713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29635448 + ... + 29692398.

It is an arithmetic number, because the mean of its divisors is an integer number (211297899960).

Almost surely, 2^{1689390078773} is an apocalyptic number.

It is an amenable number.

1689390078773 is a deficient number, since it is larger than the sum of its proper divisors (993120907).

1689390078773 is a wasteful number, since it uses less digits than its factorization.

1689390078773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73867.

The product of its (nonzero) digits is 96018048, while the sum is 68.

The spelling of 1689390078773 in words is "one trillion, six hundred eighty-nine billion, three hundred ninety million, seventy-eight thousand, seven hundred seventy-three".