489919638405 has 16 divisors (see below), whose sum is σ = 784413177984. Its totient is φ = 261109888320.

The previous prime is 489919638287. The next prime is 489919638443. The reversal of 489919638405 is 504836919984.

It is not a de Polignac number, because 489919638405 - 2²⁸ = 489651202949 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 11264166 + ... + 11307575.

It is an arithmetic number, because the mean of its divisors is an integer number (49025823624).

Almost surely, 2^489919638405 is an apocalyptic number.

It is an amenable number.

489919638405 is a deficient number, since it is larger than the sum of its proper divisors (294493539579).

489919638405 is a wasteful number, since it uses less digits than its factorization.

489919638405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22573196.

The product of its (nonzero) digits is 67184640, while the sum is 66.

The spelling of 489919638405 in words is "four hundred eighty-nine billion, nine hundred nineteen million, six hundred thirty-eight thousand, four hundred five".