648811570 has 16 divisors (see below), whose sum is σ = 1274030208. Its totient is φ = 235931440.

The previous prime is 648811549. The next prime is 648811571. The reversal of 648811570 is 75118846.

It is not an unprimeable number, because it can be changed into a prime (648811571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2949034 + ... + 2949253.

It is an arithmetic number, because the mean of its divisors is an integer number (79626888).

Almost surely, 2^648811570 is an apocalyptic number.

648811570 is a deficient number, since it is larger than the sum of its proper divisors (625218638).

648811570 is a wasteful number, since it uses less digits than its factorization.

648811570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5898305.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 648811570 is about 25471.7798749911. The cubic root of 648811570 is about 865.7108527324.

It can be divided in two parts, 648 and 811570, that added together give a palindrome (812218).

The spelling of 648811570 in words is "six hundred forty-eight million, eight hundred eleven thousand, five hundred seventy".