489378894993 has 20 divisors (see below), whose sum is σ = 769523670960. Its totient is φ = 309081406392.

The previous prime is 489378894947. The next prime is 489378895007. The reversal of 489378894993 is 399498873984.

489378894993 is a `hidden beast` number, since 4 + 89 + 378 + 89 + 4 + 9 + 93 = 666.

It is not a de Polignac number, because 489378894993 - 2⁶ = 489378894929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (489378894493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 158990955 + ... + 158994032.

It is an arithmetic number, because the mean of its divisors is an integer number (38476183548).

Almost surely, 2^489378894993 is an apocalyptic number.

It is an amenable number.

489378894993 is a deficient number, since it is larger than the sum of its proper divisors (280144775967).

489378894993 is a wasteful number, since it uses less digits than its factorization.

489378894993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317985018 (or 317985009 counting only the distinct ones).

The product of its digits is 3386105856, while the sum is 81.

The spelling of 489378894993 in words is "four hundred eighty-nine billion, three hundred seventy-eight million, eight hundred ninety-four thousand, nine hundred ninety-three".