646445662632 has 384 divisors, whose sum is σ = 2307636864000. Its totient is φ = 158381982720.

The previous prime is 646445662609. The next prime is 646445662711. The reversal of 646445662632 is 236266544646.

646445662632 is a `hidden beast` number, since 6 + 4 + 6 + 4 + 4 + 5 + 6 + 626 + 3 + 2 = 666.

It is a super-2 number, since 2×646445662632² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 24530119 + ... + 24556457.

It is an arithmetic number, because the mean of its divisors is an integer number (6009471000).

Almost surely, 2^646445662632 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 646445662632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153818432000).

646445662632 is an abundant number, since it is smaller than the sum of its proper divisors (1661191201368).

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

646445662632 is a wasteful number, since it uses less digits than its factorization.

646445662632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26621 (or 26614 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 54.

The spelling of 646445662632 in words is "six hundred forty-six billion, four hundred forty-five million, six hundred sixty-two thousand, six hundred thirty-two".