648810996 has 48 divisors (see below), whose sum is σ = 1532073984. Its totient is φ = 213687936.

The previous prime is 648810991. The next prime is 648811003. The reversal of 648810996 is 699018846.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648810991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445806 + ... + 447258.

It is an arithmetic number, because the mean of its divisors is an integer number (31918208).

Almost surely, 2^648810996 is an apocalyptic number.

It is an amenable number.

648810996 is an abundant number, since it is smaller than the sum of its proper divisors (883262988).

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

648810996 is a wasteful number, since it uses less digits than its factorization.

648810996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880 (or 1878 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 648810996 is about 25471.7686076173. The cubic root of 648810996 is about 865.7105974358.

The spelling of 648810996 in words is "six hundred forty-eight million, eight hundred ten thousand, nine hundred ninety-six".