648415873 has 12 divisors (see below), whose sum is σ = 754799472. Its totient is φ = 555402120.

The previous prime is 648415783. The next prime is 648415879. The reversal of 648415873 is 378514846.

It is a happy number.

It is not a de Polignac number, because 648415873 - 2²⁵ = 614861441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (648415879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85086 + ... + 92392.

It is an arithmetic number, because the mean of its divisors is an integer number (62899956).

Almost surely, 2^648415873 is an apocalyptic number.

It is an amenable number.

648415873 is a deficient number, since it is larger than the sum of its proper divisors (106383599).

648415873 is a wasteful number, since it uses less digits than its factorization.

648415873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9132 (or 9125 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 648415873 is about 25464.0113297179. The cubic root of 648415873 is about 865.5348237862.

The spelling of 648415873 in words is "six hundred forty-eight million, four hundred fifteen thousand, eight hundred seventy-three".