648646704 has 180 divisors, whose sum is σ = 1947573264. Its totient is φ = 209112192.

The previous prime is 648646693. The next prime is 648646711. The reversal of 648646704 is 407646846.

It is a super-2 number, since 2×648646704² = 841485093220127232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 648646704.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3884029 + ... + 3884195.

Almost surely, 2^648646704 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 648646704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (973786632).

648646704 is an abundant number, since it is smaller than the sum of its proper divisors (1298926560).

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

648646704 is an equidigital number, since it uses as much as digits as its factorization.

648646704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The square root of 648646704 is about 25468.5434212481. The cubic root of 648646704 is about 865.6375194860.

The spelling of 648646704 in words is "six hundred forty-eight million, six hundred forty-six thousand, seven hundred four".