648118101808 has 20 divisors (see below), whose sum is σ = 1329595224120. Its totient is φ = 304996753664.

The previous prime is 648118101797. The next prime is 648118101847. The reversal of 648118101808 is 808101811846.

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, 1191393298 + ... + 1191393841.

It is an arithmetic number, because the mean of its divisors is an integer number (66479761206).

Almost surely, 2^648118101808 is an apocalyptic number.

648118101808 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

648118101808 is an abundant number, since it is smaller than the sum of its proper divisors (681477122312).

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

648118101808 is a wasteful number, since it uses less digits than its factorization.

648118101808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382787164 (or 2382787158 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 46.

The spelling of 648118101808 in words is "six hundred forty-eight billion, one hundred eighteen million, one hundred one thousand, eight hundred eight".