268436436479 has 4 divisors (see below), whose sum is σ = 269841863040. Its totient is φ = 267031009920.

The previous prime is 268436436473. The next prime is 268436436487. The reversal of 268436436479 is 974634634862.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268436436479 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 (268436436473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702712994 + ... + 702713375.

It is an arithmetic number, because the mean of its divisors is an integer number (67460465760).

Almost surely, 2^268436436479 is an apocalyptic number.

268436436479 is a deficient number, since it is larger than the sum of its proper divisors (1405426561).

268436436479 is a wasteful number, since it uses less digits than its factorization.

268436436479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405426560.

The product of its digits is 125411328, while the sum is 62.

The spelling of 268436436479 in words is "two hundred sixty-eight billion, four hundred thirty-six million, four hundred thirty-six thousand, four hundred seventy-nine".