268316817820 has 48 divisors (see below), whose sum is σ = 612254361600. Its totient is φ = 98398013760.

The previous prime is 268316817781. The next prime is 268316817829. The reversal of 268316817820 is 28718613862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268316817829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11376880 + ... + 11400439.

It is an arithmetic number, because the mean of its divisors is an integer number (12755299200).

Almost surely, 2^268316817820 is an apocalyptic number.

268316817820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268316817820 is an abundant number, since it is smaller than the sum of its proper divisors (343937543780).

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

268316817820 is a wasteful number, since it uses less digits than its factorization.

268316817820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22777378 (or 22777376 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 268316817820 in words is "two hundred sixty-eight billion, three hundred sixteen million, eight hundred seventeen thousand, eight hundred twenty".