489923665920 has 1120 divisors, whose sum is σ = 1948912767648. Its totient is φ = 116955021312.

The previous prime is 489923665853. The next prime is 489923665951. The reversal of 489923665920 is 29566329984.

489923665920 is a `hidden beast` number, since 4 + 8 + 9 + 9 + 2 + 36 + 6 + 592 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1595842407 + ... + 1595842713.

Almost surely, 2^489923665920 is an apocalyptic number.

489923665920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 489923665920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (974456383824).

489923665920 is an abundant number, since it is smaller than the sum of its proper divisors (1458989101728).

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

489923665920 is a wasteful number, since it uses less digits than its factorization.

489923665920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 63.

The spelling of 489923665920 in words is "four hundred eighty-nine billion, nine hundred twenty-three million, six hundred sixty-five thousand, nine hundred twenty".