268768653497 has 4 divisors (see below), whose sum is σ = 268770750756. Its totient is φ = 268766556240.

The previous prime is 268768653473. The next prime is 268768653511. The reversal of 268768653497 is 794356867862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 794356867862 = 2 ⋅397178433931.

It can be written as a sum of positive squares in 2 ways, for example, as 148428349696 + 120340303801 = 385264^2 + 346901^2 .

It is a cyclic number.

It is not a de Polignac number, because 268768653497 - 2¹⁰ = 268768652473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 268768653497.

It is not an unprimeable number, because it can be changed into a prime (268768653997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 842954 + ... + 1117187.

It is an arithmetic number, because the mean of its divisors is an integer number (67192687689).

Almost surely, 2^268768653497 is an apocalyptic number.

It is an amenable number.

268768653497 is a deficient number, since it is larger than the sum of its proper divisors (2097259).

268768653497 is a wasteful number, since it uses less digits than its factorization.

268768653497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097258.

The product of its digits is 731566080, while the sum is 71.

The spelling of 268768653497 in words is "two hundred sixty-eight billion, seven hundred sixty-eight million, six hundred fifty-three thousand, four hundred ninety-seven".