648958656 has 56 divisors (see below), whose sum is σ = 1720041264. Its totient is φ = 215941120.

The previous prime is 648958649. The next prime is 648958669. The reversal of 648958656 is 656859846.

It is a happy number.

It is a super-2 number, since 2×648958656² = 842294674394652672, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 648958596 and 648958605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120436 + ... + 125708.

Almost surely, 2^648958656 is an apocalyptic number.

It is an amenable number.

648958656 is an abundant number, since it is smaller than the sum of its proper divisors (1071082608).

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

648958656 is a wasteful number, since it uses less digits than its factorization.

648958656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5929 (or 5919 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 57.

The square root of 648958656 is about 25474.6669458111. Note that the first 3 decimals coincide. The cubic root of 648958656 is about 865.7762668585.

The spelling of 648958656 in words is "six hundred forty-eight million, nine hundred fifty-eight thousand, six hundred fifty-six".