6405730650 has 72 divisors (see below), whose sum is σ = 18774628704. Its totient is φ = 1552903200.

The previous prime is 6405730631. The next prime is 6405730651. The reversal of 6405730650 is 560375046.

6405730650 is a `hidden beast` number, since 640 + 5 + 7 + 3 + 0 + 6 + 5 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (6405730651) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 642094 + ... + 651993.

It is an arithmetic number, because the mean of its divisors is an integer number (260758732).

Almost surely, 2^6405730650 is an apocalyptic number.

6405730650 is an abundant number, since it is smaller than the sum of its proper divisors (12368898054).

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

6405730650 is a wasteful number, since it uses less digits than its factorization.

6405730650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294116 (or 1294108 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 6405730650 is about 80035.8085484241. The cubic root of 6405730650 is about 1857.1895206505.

The spelling of 6405730650 in words is "six billion, four hundred five million, seven hundred thirty thousand, six hundred fifty".