268778340297 has 12 divisors (see below), whose sum is σ = 391797174340. Its totient is φ = 177541655328.

The previous prime is 268778340287. The next prime is 268778340323. The reversal of 268778340297 is 792043877862.

268778340297 is a `hidden beast` number, since 2 + 68 + 7 + 7 + 83 + 402 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 141228646416 + 127549693881 = 375804^2 + 357141^2 .

It is not a de Polignac number, because 268778340297 - 2⁷ = 268778340169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268778340287) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136991038 + ... + 136992999.

Almost surely, 2^268778340297 is an apocalyptic number.

It is an amenable number.

268778340297 is a deficient number, since it is larger than the sum of its proper divisors (123018834043).

268778340297 is a wasteful number, since it uses less digits than its factorization.

268778340297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273984152 (or 273984149 counting only the distinct ones).

The product of its (nonzero) digits is 56899584, while the sum is 63.

The spelling of 268778340297 in words is "two hundred sixty-eight billion, seven hundred seventy-eight million, three hundred forty thousand, two hundred ninety-seven".