268505613 has 12 divisors (see below), whose sum is σ = 392200380. Its totient is φ = 176991936.

The previous prime is 268505609. The next prime is 268505617. The reversal of 268505613 is 316505862.

It is an interprime number because it is at equal distance from previous prime (268505609) and next prime (268505617).

It can be written as a sum of positive squares in 2 ways, for example, as 120956004 + 147549609 = 10998^2 + 12147^2 .

It is not a de Polignac number, because 268505613 - 2² = 268505609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268505617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166806 + ... + 168407.

It is an arithmetic number, because the mean of its divisors is an integer number (32683365).

Almost surely, 2^268505613 is an apocalyptic number.

It is an amenable number.

268505613 is a deficient number, since it is larger than the sum of its proper divisors (123694767).

268505613 is a wasteful number, since it uses less digits than its factorization.

268505613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335308 (or 335305 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 268505613 is about 16386.1408818550. The cubic root of 268505613 is about 645.1357709498.

The spelling of 268505613 in words is "two hundred sixty-eight million, five hundred five thousand, six hundred thirteen".