268991756208 has 60 divisors (see below), whose sum is σ = 860346652048. Its totient is φ = 76854787200.

The previous prime is 268991756183. The next prime is 268991756251. The reversal of 268991756208 is 802657199862.

268991756208 is a `hidden beast` number, since 2 + 68 + 9 + 9 + 1 + 7 + 562 + 0 + 8 = 666.

268991756208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 11 ways as a sum of consecutive naturals, for example, 133427443 + ... + 133429458.

Almost surely, 2^268991756208 is an apocalyptic number.

268991756208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

268991756208 is an abundant number, since it is smaller than the sum of its proper divisors (591354895840).

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

268991756208 is a wasteful number, since it uses less digits than its factorization.

268991756208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266856922 (or 266856913 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 268991756208 in words is "two hundred sixty-eight billion, nine hundred ninety-one million, seven hundred fifty-six thousand, two hundred eight".