489718565 has 16 divisors (see below), whose sum is σ = 678542592. Its totient is φ = 332342784.

The previous prime is 489718531. The next prime is 489718589. The reversal of 489718565 is 565817984.

489718565 = T₃₁₂₉ + T₃₁₃₀ + ... + T₃₂₂₅.

It is a cyclic number.

It is not a de Polignac number, because 489718565 - 2¹² = 489714469 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68729 + ... + 75518.

It is an arithmetic number, because the mean of its divisors is an integer number (42408912).

Almost surely, 2^489718565 is an apocalyptic number.

It is an amenable number.

489718565 is a deficient number, since it is larger than the sum of its proper divisors (188824027).

489718565 is a wasteful number, since it uses less digits than its factorization.

489718565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144356.

The product of its digits is 2419200, while the sum is 53.

The square root of 489718565 is about 22129.5857394575. The cubic root of 489718565 is about 788.2225514175. Note that the first 3 decimals are identical.

The spelling of 489718565 in words is "four hundred eighty-nine million, seven hundred eighteen thousand, five hundred sixty-five".