605621221650 has 72 divisors (see below), whose sum is σ = 1627303476864. Its totient is φ = 161479029600.

The previous prime is 605621221633. The next prime is 605621221657. The reversal of 605621221650 is 56122126506.

605621221650 is a `hidden beast` number, since 6 + 0 + 5 + 621 + 2 + 21 + 6 + 5 + 0 = 666.

It is a super-2 number, since 2×605621221650² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (605621221657) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 3758235 + ... + 3916065.

Almost surely, 2^605621221650 is an apocalyptic number.

605621221650 is an abundant number, since it is smaller than the sum of its proper divisors (1021682255214).

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

605621221650 is a wasteful number, since it uses less digits than its factorization.

605621221650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166376 (or 166368 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 605621221650 in words is "six hundred five billion, six hundred twenty-one million, two hundred twenty-one thousand, six hundred fifty".