648889515 has 16 divisors (see below), whose sum is σ = 1153581600. Its totient is φ = 346074336.

The previous prime is 648889511. The next prime is 648889517. The reversal of 648889515 is 515988846.

It is a happy number.

648889515 is a `hidden beast` number, since 6 + 48 + 8 + 89 + 515 = 666.

648889515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 648889515 - 2² = 648889511 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (648889511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2403160 + ... + 2403429.

It is an arithmetic number, because the mean of its divisors is an integer number (72098850).

Almost surely, 2^648889515 is an apocalyptic number.

648889515 is a deficient number, since it is larger than the sum of its proper divisors (504692085).

648889515 is a wasteful number, since it uses less digits than its factorization.

648889515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806603 (or 4806597 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The square root of 648889515 is about 25473.3098556116. The cubic root of 648889515 is about 865.7455187452.

The spelling of 648889515 in words is "six hundred forty-eight million, eight hundred eighty-nine thousand, five hundred fifteen".