268563439271 has 4 divisors (see below), whose sum is σ = 269554448544. Its totient is φ = 267572430000.

The previous prime is 268563439231. The next prime is 268563439289. The reversal of 268563439271 is 172934365862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268563439271 is a prime.

It is a super-2 number, since 2×268563439271² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268563439201) 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, 495504230 + ... + 495504771.

It is an arithmetic number, because the mean of its divisors is an integer number (67388612136).

Almost surely, 2^268563439271 is an apocalyptic number.

268563439271 is a deficient number, since it is larger than the sum of its proper divisors (991009273).

268563439271 is an equidigital number, since it uses as much as digits as its factorization.

268563439271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991009272.

The product of its digits is 13063680, while the sum is 56.

The spelling of 268563439271 in words is "two hundred sixty-eight billion, five hundred sixty-three million, four hundred thirty-nine thousand, two hundred seventy-one".