646310196 has 216 divisors, whose sum is σ = 2007742464. Its totient is φ = 174545280.

The previous prime is 646310179. The next prime is 646310201. The reversal of 646310196 is 691013646.

646310196 is a `hidden beast` number, since 6 + 4 + 631 + 0 + 19 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 646310196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2898141 + ... + 2898363.

It is an arithmetic number, because the mean of its divisors is an integer number (9295104).

Almost surely, 2^646310196 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646310196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003871232).

646310196 is an abundant number, since it is smaller than the sum of its proper divisors (1361432268).

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

646310196 is a wasteful number, since it uses less digits than its factorization.

646310196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 646310196 is about 25422.6315711022. The cubic root of 646310196 is about 864.5968901442.

The spelling of 646310196 in words is "six hundred forty-six million, three hundred ten thousand, one hundred ninety-six".