648488336488 has 8 divisors (see below), whose sum is σ = 1215915630930. Its totient is φ = 324244168240.

The previous prime is 648488336479. The next prime is 648488336521. The reversal of 648488336488 is 884633884846.

It can be written as a sum of positive squares in only one way, i.e., 648446888644 + 41447844 = 805262^2 + 6438^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40530521023 + ... + 40530521038.

Almost surely, 2^648488336488 is an apocalyptic number.

It is an amenable number.

648488336488 is a deficient number, since it is larger than the sum of its proper divisors (567427294442).

648488336488 is a wasteful number, since it uses less digits than its factorization.

648488336488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81061042067 (or 81061042063 counting only the distinct ones).

The product of its digits is 679477248, while the sum is 70.

The spelling of 648488336488 in words is "six hundred forty-eight billion, four hundred eighty-eight million, three hundred thirty-six thousand, four hundred eighty-eight".