646463012105300 has 108 divisors (see below), whose sum is σ = 1519110584801460. Its totient is φ = 238682169123840.

The previous prime is 646463012105293. The next prime is 646463012105333. The reversal of 646463012105300 is 3501210364646.

It can be written as a sum of positive squares in 18 ways, for example, as 617112145594564 + 29350866510736 = 24841742^2 + 5417644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 342687056 + ... + 344568344.

Almost surely, 2^{646463012105300} 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 646463012105300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (759555292400730).

646463012105300 is an abundant number, since it is smaller than the sum of its proper divisors (872647572696160).

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

646463012105300 is a wasteful number, since it uses less digits than its factorization.

646463012105300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901662 (or 1901642 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

Adding to 646463012105300 its reverse (3501210364646), we get a palindrome (649964222469946).

The spelling of 646463012105300 in words is "six hundred forty-six trillion, four hundred sixty-three billion, twelve million, one hundred five thousand, three hundred".