648207578804 has 12 divisors (see below), whose sum is σ = 1173479237700. Its totient is φ = 312927796608.

The previous prime is 648207578791. The next prime is 648207578917. The reversal of 648207578804 is 408875702846.

It can be written as a sum of positive squares in 2 ways, for example, as 323647210000 + 324560368804 = 568900^2 + 569702^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2793998069 + ... + 2793998300.

It is an arithmetic number, because the mean of its divisors is an integer number (97789936475).

Almost surely, 2^648207578804 is an apocalyptic number.

It is an amenable number.

648207578804 is a deficient number, since it is larger than the sum of its proper divisors (525271658896).

648207578804 is a wasteful number, since it uses less digits than its factorization.

648207578804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5587996402 (or 5587996400 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 59.

The spelling of 648207578804 in words is "six hundred forty-eight billion, two hundred seven million, five hundred seventy-eight thousand, eight hundred four".