268564631 has 4 divisors (see below), whose sum is σ = 268758000. Its totient is φ = 268371264.

The previous prime is 268564613. The next prime is 268564633. The reversal of 268564631 is 136465862.

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

It is a cyclic number.

It is not a de Polignac number, because 268564631 - 2⁶ = 268564567 is a prime.

It is a super-2 number, since 2×268564631² = 144253922048332322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268564633) 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, 94586 + ... + 97383.

It is an arithmetic number, because the mean of its divisors is an integer number (67189500).

Almost surely, 2^268564631 is an apocalyptic number.

268564631 is a deficient number, since it is larger than the sum of its proper divisors (193369).

268564631 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 268564631 = (128663645)₁₁.

268564631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193368.

The product of its digits is 207360, while the sum is 41.

The square root of 268564631 is about 16387.9416340186. The cubic root of 268564631 is about 645.1830348080.

The spelling of 268564631 in words is "two hundred sixty-eight million, five hundred sixty-four thousand, six hundred thirty-one".