648378892010 has 16 divisors (see below), whose sum is σ = 1180195288200. Its totient is φ = 256437494016.

The previous prime is 648378892001. The next prime is 648378892019. The reversal of 648378892010 is 10298873846.

It is an interprime number because it is at equal distance from previous prime (648378892001) and next prime (648378892019).

It can be written as a sum of positive squares in 4 ways, for example, as 240289177249 + 408089714761 = 490193^2 + 638819^2 .

It is not an unprimeable number, because it can be changed into a prime (648378892019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 364256915 + ... + 364258694.

Almost surely, 2^648378892010 is an apocalyptic number.

648378892010 is a deficient number, since it is larger than the sum of its proper divisors (531816396190).

648378892010 is a wasteful number, since it uses less digits than its factorization.

648378892010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728515705.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 648378892010 in words is "six hundred forty-eight billion, three hundred seventy-eight million, eight hundred ninety-two thousand, ten".