268668541 has 4 divisors (see below), whose sum is σ = 271133500. Its totient is φ = 266203584.

The previous prime is 268668529. The next prime is 268668551. The reversal of 268668541 is 145866862.

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

It can be written as a sum of positive squares in 2 ways, for example, as 196588441 + 72080100 = 14021^2 + 8490^2 .

It is a cyclic number.

It is not a de Polignac number, because 268668541 - 2¹¹ = 268666493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 268668491 and 268668500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268668511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1232316 + ... + 1232533.

It is an arithmetic number, because the mean of its divisors is an integer number (67783375).

Almost surely, 2^268668541 is an apocalyptic number.

It is an amenable number.

268668541 is a deficient number, since it is larger than the sum of its proper divisors (2464959).

268668541 is a wasteful number, since it uses less digits than its factorization.

268668541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464958.

The product of its digits is 552960, while the sum is 46.

The square root of 268668541 is about 16391.1116462551. Note that the first 3 decimals coincide. The cubic root of 268668541 is about 645.2662330615.

The spelling of 268668541 in words is "two hundred sixty-eight million, six hundred sixty-eight thousand, five hundred forty-one".