648737536 has 18 divisors (see below), whose sum is σ = 1294941452. Its totient is φ = 324368640.

The previous prime is 648737533. The next prime is 648737587. The reversal of 648737536 is 635737846.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 648737536.

It is not an unprimeable number, because it can be changed into a prime (648737533) by changing a digit.

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 as a sum of consecutive naturals, namely, 1266810 + ... + 1267321.

Almost surely, 2^648737536 is an apocalyptic number.

It is an amenable number.

648737536 is a deficient number, since it is larger than the sum of its proper divisors (646203916).

648737536 is an equidigital number, since it uses as much as digits as its factorization.

648737536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534147 (or 2534133 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 49.

The square root of 648737536 is about 25470.3265781968. The cubic root of 648737536 is about 865.6779235646.

The spelling of 648737536 in words is "six hundred forty-eight million, seven hundred thirty-seven thousand, five hundred thirty-six".