646294801896 has 384 divisors, whose sum is σ = 1973669068800. Its totient is φ = 190085253120.

The previous prime is 646294801843. The next prime is 646294801897. The reversal of 646294801896 is 698108492646.

646294801896 is a `hidden beast` number, since 6 + 4 + 62 + 9 + 480 + 1 + 8 + 96 = 666.

It is not an unprimeable number, because it can be changed into a prime (646294801897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 207210625 + ... + 207213743.

It is an arithmetic number, because the mean of its divisors is an integer number (5139763200).

Almost surely, 2^646294801896 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 646294801896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (986834534400).

646294801896 is an abundant number, since it is smaller than the sum of its proper divisors (1327374266904).

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

646294801896 is a wasteful number, since it uses less digits than its factorization.

646294801896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349 (or 3342 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 63.

The spelling of 646294801896 in words is "six hundred forty-six billion, two hundred ninety-four million, eight hundred one thousand, eight hundred ninety-six".