268564826 has 4 divisors (see below), whose sum is σ = 402847242. Its totient is φ = 134282412.

The previous prime is 268564823. The next prime is 268564837. The reversal of 268564826 is 628465862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 628465862 = 2 ⋅314232931.

It can be written as a sum of positive squares in only one way, i.e., 184824025 + 83740801 = 13595^2 + 9151^2 .

It is not an unprimeable number, because it can be changed into a prime (268564823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67141205 + ... + 67141208.

Almost surely, 2^268564826 is an apocalyptic number.

268564826 is a deficient number, since it is larger than the sum of its proper divisors (134282416).

268564826 is a wasteful number, since it uses less digits than its factorization.

268564826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134282415.

The product of its digits is 1105920, while the sum is 47.

The square root of 268564826 is about 16387.9475835139. The cubic root of 268564826 is about 645.1831909599.

The spelling of 268564826 in words is "two hundred sixty-eight million, five hundred sixty-four thousand, eight hundred twenty-six".