646104546216 has 160 divisors (see below), whose sum is σ = 1886210726400. Its totient is φ = 206396657280.

The previous prime is 646104546181. The next prime is 646104546223. The reversal of 646104546216 is 612645401646.

646104546216 is a `hidden beast` number, since 6 + 4 + 6 + 10 + 4 + 5 + 4 + 621 + 6 = 666.

It is a super-4 number, since 4×646104546216⁴ (a number of 48 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1912930 + ... + 2225198.

It is an arithmetic number, because the mean of its divisors is an integer number (11788817040).

Almost surely, 2^646104546216 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 646104546216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943105363200).

646104546216 is an abundant number, since it is smaller than the sum of its proper divisors (1240106180184).

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

646104546216 is a wasteful number, since it uses less digits than its factorization.

646104546216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312421 (or 312408 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 646104546216 in words is "six hundred forty-six billion, one hundred four million, five hundred forty-six thousand, two hundred sixteen".