268778340359 has 4 divisors (see below), whose sum is σ = 270558329520. Its totient is φ = 266998351200.

The previous prime is 268778340323. The next prime is 268778340419. The reversal of 268778340359 is 953043877862.

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-268778340359 is a prime.

It is a super-2 number, since 2×268778340359² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268778340059) 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, 889994354 + ... + 889994655.

It is an arithmetic number, because the mean of its divisors is an integer number (67639582380).

Almost surely, 2^268778340359 is an apocalyptic number.

268778340359 is a deficient number, since it is larger than the sum of its proper divisors (1779989161).

268778340359 is a wasteful number, since it uses less digits than its factorization.

268778340359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779989160.

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 268778340359 in words is "two hundred sixty-eight billion, seven hundred seventy-eight million, three hundred forty thousand, three hundred fifty-nine".