648552836 has 12 divisors (see below), whose sum is σ = 1138550028. Its totient is φ = 323252832.

The previous prime is 648552811. The next prime is 648552871. The reversal of 648552836 is 638255846.

It can be written as a sum of positive squares in 2 ways, for example, as 364428100 + 284124736 = 19090^2 + 16856^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254471 + ... + 257006.

It is an arithmetic number, because the mean of its divisors is an integer number (94879169).

Almost surely, 2^648552836 is an apocalyptic number.

It is an amenable number.

648552836 is a deficient number, since it is larger than the sum of its proper divisors (489997192).

648552836 is a wasteful number, since it uses less digits than its factorization.

648552836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511798 (or 511796 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 47.

The square root of 648552836 is about 25466.7005322637. The cubic root of 648552836 is about 865.5957609642.

The spelling of 648552836 in words is "six hundred forty-eight million, five hundred fifty-two thousand, eight hundred thirty-six".