646300652550 has 384 divisors, whose sum is σ = 1911045685248. Its totient is φ = 141491328000.

The previous prime is 646300652549. The next prime is 646300652567. The reversal of 646300652550 is 55256003646.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 682471177 + ... + 682472123.

It is an arithmetic number, because the mean of its divisors is an integer number (4976681472).

Almost surely, 2^646300652550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646300652550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (955522842624).

646300652550 is an abundant number, since it is smaller than the sum of its proper divisors (1264745032698).

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

646300652550 is a wasteful number, since it uses less digits than its factorization.

646300652550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 646300652550 in words is "six hundred forty-six billion, three hundred million, six hundred fifty-two thousand, five hundred fifty".