268677392281 has 3 divisors (see below), whose sum is σ = 268677910623. Its totient is φ = 268676873940.

The previous prime is 268677392261. The next prime is 268677392287. The reversal of 268677392281 is 182293776862.

The square root of 268677392281 is 518341.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 226299052681 + 42378339600 = 475709^2 + 205860^2 .

It is not a de Polignac number, because 268677392281 - 2⁷ = 268677392153 is a prime.

It is a super-2 number, since 2×268677392281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268677392287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 259171 + ... + 777511.

It is an arithmetic number, because the mean of its divisors is an integer number (89559303541).

Almost surely, 2^268677392281 is an apocalyptic number.

268677392281 is the 518341-st square number.

268677392281 is the 259171-st centered octagonal number.

It is an amenable number.

268677392281 is a deficient number, since it is larger than the sum of its proper divisors (518342).

268677392281 is an frugal number, since it uses more digits than its factorization.

268677392281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036682 (or 518341 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 268677392281 in words is "two hundred sixty-eight billion, six hundred seventy-seven million, three hundred ninety-two thousand, two hundred eighty-one".