268921271261 has 16 divisors (see below), whose sum is σ = 285192576000. Its totient is φ = 252867686400.

The previous prime is 268921271257. The next prime is 268921271273. The reversal of 268921271261 is 162172129862.

It is not a de Polignac number, because 268921271261 - 2² = 268921271257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268921279261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1546901 + ... + 1711941.

It is an arithmetic number, because the mean of its divisors is an integer number (17824536000).

Almost surely, 2^268921271261 is an apocalyptic number.

It is an amenable number.

268921271261 is a deficient number, since it is larger than the sum of its proper divisors (16271304739).

268921271261 is a wasteful number, since it uses less digits than its factorization.

268921271261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165700.

The product of its digits is 290304, while the sum is 47.

The spelling of 268921271261 in words is "two hundred sixty-eight billion, nine hundred twenty-one million, two hundred seventy-one thousand, two hundred sixty-one".