648995456 has 16 divisors (see below), whose sum is σ = 1292920890. Its totient is φ = 324497664.

The previous prime is 648995449. The next prime is 648995461. The reversal of 648995456 is 654599846.

It can be written as a sum of positive squares in only one way, i.e., 604373056 + 44622400 = 24584^2 + 6680^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-3 number, since 3×648995456³ (a number of 27 digits) contains 333 as substring.

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 as a sum of consecutive naturals, namely, 2535011 + ... + 2535266.

Almost surely, 2^648995456 is an apocalyptic number.

It is an amenable number.

648995456 is a deficient number, since it is larger than the sum of its proper divisors (643925434).

648995456 is an equidigital number, since it uses as much as digits as its factorization.

648995456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5070291 (or 5070279 counting only the distinct ones).

The product of its digits is 9331200, while the sum is 56.

The square root of 648995456 is about 25475.3892217568. The cubic root of 648995456 is about 865.7926315191.

The spelling of 648995456 in words is "six hundred forty-eight million, nine hundred ninety-five thousand, four hundred fifty-six".