268851317820 has 48 divisors (see below), whose sum is σ = 752807895840. Its totient is φ = 71691379456.

The previous prime is 268851317773. The next prime is 268851317837. The reversal of 268851317820 is 28713158862.

268851317820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2675446 + ... + 2774114.

It is an arithmetic number, because the mean of its divisors is an integer number (15683497830).

Almost surely, 2^268851317820 is an apocalyptic number.

268851317820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268851317820 is an abundant number, since it is smaller than the sum of its proper divisors (483956578020).

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

268851317820 is a wasteful number, since it uses less digits than its factorization.

268851317820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144094 (or 144092 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 51.

The spelling of 268851317820 in words is "two hundred sixty-eight billion, eight hundred fifty-one million, three hundred seventeen thousand, eight hundred twenty".