268528920653 has 16 divisors (see below), whose sum is σ = 323063808000. Its totient is φ = 218039049072.

The previous prime is 268528920631. The next prime is 268528920661. The reversal of 268528920653 is 356029825862.

It is a cyclic number.

It is not a de Polignac number, because 268528920653 - 2¹⁰ = 268528919629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268528920623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2234228 + ... + 2351346.

It is an arithmetic number, because the mean of its divisors is an integer number (20191488000).

Almost surely, 2^268528920653 is an apocalyptic number.

It is an amenable number.

268528920653 is a deficient number, since it is larger than the sum of its proper divisors (54534887347).

268528920653 is a wasteful number, since it uses less digits than its factorization.

268528920653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134384.

The product of its (nonzero) digits is 12441600, while the sum is 56.

The spelling of 268528920653 in words is "two hundred sixty-eight billion, five hundred twenty-eight million, nine hundred twenty thousand, six hundred fifty-three".