650506489920 has 1344 divisors, whose sum is σ = 2882852044800. Its totient is φ = 136250449920.

The previous prime is 650506489907. The next prime is 650506489937. The reversal of 650506489920 is 29984605056.

It is a happy number.

650506489920 is a `hidden beast` number, since 6 + 5 + 0 + 506 + 48 + 9 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 320603466 + ... + 320605494.

It is an arithmetic number, because the mean of its divisors is an integer number (2144979200).

Almost surely, 2^650506489920 is an apocalyptic number.

650506489920 is a gapful number since it is divisible by the number (60) 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 650506489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1441426022400).

650506489920 is an abundant number, since it is smaller than the sum of its proper divisors (2232345554880).

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

650506489920 is a wasteful number, since it uses less digits than its factorization.

650506489920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118 (or 2096 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 650506489920 in words is "six hundred fifty billion, five hundred six million, four hundred eighty-nine thousand, nine hundred twenty".