650621221140 has 192 divisors, whose sum is σ = 2100012687360. Its totient is φ = 148958684160.

The previous prime is 650621221123. The next prime is 650621221147. The reversal of 650621221140 is 41122126056.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 650621221098 and 650621221107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650621221147) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 927952 + ... + 1470488.

It is an arithmetic number, because the mean of its divisors is an integer number (10937566080).

Almost surely, 2^650621221140 is an apocalyptic number.

650621221140 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 650621221140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050006343680).

650621221140 is an abundant number, since it is smaller than the sum of its proper divisors (1449391466220).

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

650621221140 is a wasteful number, since it uses less digits than its factorization.

650621221140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542662 (or 542660 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

Adding to 650621221140 its reverse (41122126056), we get a palindrome (691743347196).

The spelling of 650621221140 in words is "six hundred fifty billion, six hundred twenty-one million, two hundred twenty-one thousand, one hundred forty".