646506382854 has 8 divisors (see below), whose sum is σ = 1293012765720. Its totient is φ = 215502127616.

The previous prime is 646506382793. The next prime is 646506382861. The reversal of 646506382854 is 458283605646.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

646506382854 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 646506382794 and 646506382803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53875531899 + ... + 53875531910.

It is an arithmetic number, because the mean of its divisors is an integer number (161626595715).

Almost surely, 2^646506382854 is an apocalyptic number.

646506382854 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

646506382854 is a wasteful number, since it uses less digits than its factorization.

646506382854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107751063814.

The product of its (nonzero) digits is 33177600, while the sum is 57.

The spelling of 646506382854 in words is "six hundred forty-six billion, five hundred six million, three hundred eighty-two thousand, eight hundred fifty-four".