646848974016 has 1344 divisors, whose sum is σ = 2452975779840. Its totient is φ = 163452764160.

The previous prime is 646848973973. The next prime is 646848974027. The reversal of 646848974016 is 610479848646.

646848974016 is a `hidden beast` number, since 6 + 468 + 48 + 97 + 40 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 5093298945 + ... + 5093299071.

Almost surely, 2^646848974016 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 646848974016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1226487889920).

646848974016 is an abundant number, since it is smaller than the sum of its proper divisors (1806126805824).

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

646848974016 is a wasteful number, since it uses less digits than its factorization.

646848974016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 63.

The spelling of 646848974016 in words is "six hundred forty-six billion, eight hundred forty-eight million, nine hundred seventy-four thousand, sixteen".