646050006 has 84 divisors (see below), whose sum is σ = 1690350732. Its totient is φ = 184565304.

The previous prime is 646050001. The next prime is 646050061. The reversal of 646050006 is 600050646.

It is a super-2 number, since 2×646050006² = 834761220505200072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646050001) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 66921 + ... + 75963.

It is an arithmetic number, because the mean of its divisors is an integer number (20123223).

Almost surely, 2^646050006 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646050006, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845175366).

646050006 is an abundant number, since it is smaller than the sum of its proper divisors (1044300726).

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

646050006 is an equidigital number, since it uses as much as digits as its factorization.

646050006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9077 (or 9055 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 646050006 is about 25417.5137651187. The cubic root of 646050006 is about 864.4808521277.

The spelling of 646050006 in words is "six hundred forty-six million, fifty thousand, six".