268920507806495 has 16 divisors (see below), whose sum is σ = 327529064544480. Its totient is φ = 211920259039104.

The previous prime is 268920507806453. The next prime is 268920507806507. The reversal of 268920507806495 is 594608705029862.

It is a cyclic number.

It is not a de Polignac number, because 268920507806495 - 2²⁰ = 268920506757919 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4053629 + ... + 23543001.

It is an arithmetic number, because the mean of its divisors is an integer number (20470566534030).

Almost surely, 2^{268920507806495} is an apocalyptic number.

268920507806495 is a deficient number, since it is larger than the sum of its proper divisors (58608556737985).

268920507806495 is a wasteful number, since it uses less digits than its factorization.

268920507806495 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19530634.

The product of its (nonzero) digits is 522547200, while the sum is 71.

The spelling of 268920507806495 in words is "two hundred sixty-eight trillion, nine hundred twenty billion, five hundred seven million, eight hundred six thousand, four hundred ninety-five".