268296926949221 has 4 divisors (see below), whose sum is σ = 268297075498272. Its totient is φ = 268296778400172.

The previous prime is 268296926949199. The next prime is 268296926949241. The reversal of 268296926949221 is 122949629692862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268296926949221 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 (268296926949241) 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, 71531585 + ... + 75188838.

It is an arithmetic number, because the mean of its divisors is an integer number (67074268874568).

Almost surely, 2^{268296926949221} is an apocalyptic number.

It is an amenable number.

268296926949221 is a deficient number, since it is larger than the sum of its proper divisors (148549051).

268296926949221 is a wasteful number, since it uses less digits than its factorization.

268296926949221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148549050.

The product of its digits is 1451188224, while the sum is 77.

The spelling of 268296926949221 in words is "two hundred sixty-eight trillion, two hundred ninety-six billion, nine hundred twenty-six million, nine hundred forty-nine thousand, two hundred twenty-one".