648378873846 has 48 divisors (see below), whose sum is σ = 1532795226768. Its totient is φ = 196444684800.

The previous prime is 648378873809. The next prime is 648378873851.

648378873846 is a `hidden beast` number, since 6 + 483 + 78 + 8 + 7 + 38 + 46 = 666.

648378873846 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 886030 + ... + 1442846.

It is an arithmetic number, because the mean of its divisors is an integer number (31933233891).

Almost surely, 2^648378873846 is an apocalyptic number.

648378873846 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

648378873846 is an abundant number, since it is smaller than the sum of its proper divisors (884416352922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

648378873846 is a wasteful number, since it uses less digits than its factorization.

648378873846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562717 (or 562714 counting only the distinct ones).

The product of its digits is 1040449536, while the sum is 72.

The spelling of 648378873846 in words is "six hundred forty-eight billion, three hundred seventy-eight million, eight hundred seventy-three thousand, eight hundred forty-six".