268382420509 has 4 divisors (see below), whose sum is σ = 306722766304. Its totient is φ = 230042074716.

The previous prime is 268382420489. The next prime is 268382420561. The reversal of 268382420509 is 905024283862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 905024283862 = 2 ⋅452512141931.

It is a cyclic number.

It is not a de Polignac number, because 268382420509 - 2⁷ = 268382420381 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 (268382426509) 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, 19170172887 + ... + 19170172900.

It is an arithmetic number, because the mean of its divisors is an integer number (76680691576).

Almost surely, 2^268382420509 is an apocalyptic number.

It is an amenable number.

268382420509 is a deficient number, since it is larger than the sum of its proper divisors (38340345795).

268382420509 is an equidigital number, since it uses as much as digits as its factorization.

268382420509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38340345794.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 268382420509 in words is "two hundred sixty-eight billion, three hundred eighty-two million, four hundred twenty thousand, five hundred nine".