268774391808 has 480 divisors, whose sum is σ = 869693849920. Its totient is φ = 82556485632.

The previous prime is 268774391803. The next prime is 268774391819. The reversal of 268774391808 is 808193477862.

268774391808 is a `hidden beast` number, since 26 + 87 + 74 + 391 + 80 + 8 = 666.

It is a nialpdrome in base 12.

It is a zygodrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268774391803) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465813216 + ... + 465813792.

Almost surely, 2^268774391808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 268774391808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434846924960).

268774391808 is an abundant number, since it is smaller than the sum of its proper divisors (600919458112).

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

268774391808 is an frugal number, since it uses more digits than its factorization.

268774391808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 268774391808 in words is "two hundred sixty-eight billion, seven hundred seventy-four million, three hundred ninety-one thousand, eight hundred eight".