268655183331720 has 128 divisors (see below), whose sum is σ = 821701242633600. Its totient is φ = 70244394881024.

The previous prime is 268655183331713. The next prime is 268655183331749. The reversal of 268655183331720 is 27133381556862.

It is a Harshad number since it is a multiple of its sum of digits (60).

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 31 ways as a sum of consecutive naturals, for example, 3722850 + ... + 23477009.

It is an arithmetic number, because the mean of its divisors is an integer number (6419540958075).

Almost surely, 2^{268655183331720} is an apocalyptic number.

268655183331720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 268655183331720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (410850621316800).

268655183331720 is an abundant number, since it is smaller than the sum of its proper divisors (553046059301880).

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

268655183331720 is a wasteful number, since it uses less digits than its factorization.

268655183331720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27201479 (or 27201475 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 60.

The spelling of 268655183331720 in words is "two hundred sixty-eight trillion, six hundred fifty-five billion, one hundred eighty-three million, three hundred thirty-one thousand, seven hundred twenty".