489045988638 has 20 divisors (see below), whose sum is σ = 1095825271200. Its totient is φ = 163015329492.

The previous prime is 489045988619. The next prime is 489045988681. The reversal of 489045988638 is 836889540984.

489045988638 is a `hidden beast` number, since 4 + 8 + 90 + 459 + 8 + 86 + 3 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1509401038 + ... + 1509401361.

It is an arithmetic number, because the mean of its divisors is an integer number (54791263560).

Almost surely, 2^489045988638 is an apocalyptic number.

489045988638 is an abundant number, since it is smaller than the sum of its proper divisors (606779282562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

489045988638 is a wasteful number, since it uses less digits than its factorization.

489045988638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018802413 (or 3018802404 counting only the distinct ones).

The product of its (nonzero) digits is 477757440, while the sum is 72.

The spelling of 489045988638 in words is "four hundred eighty-nine billion, forty-five million, nine hundred eighty-eight thousand, six hundred thirty-eight".