268891557729361 has 8 divisors (see below), whose sum is σ = 307306315319360. Its totient is φ = 230477219617968.

The previous prime is 268891557729323. The next prime is 268891557729371. The reversal of 268891557729361 is 163927755198862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 268891557729361 - 2¹¹ = 268891557727313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (268891557729371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103494846 + ... + 106061143.

It is an arithmetic number, because the mean of its divisors is an integer number (38413289414920).

Almost surely, 2^{268891557729361} is an apocalyptic number.

It is an amenable number.

268891557729361 is a deficient number, since it is larger than the sum of its proper divisors (38414757589999).

268891557729361 is a wasteful number, since it uses less digits than its factorization.

268891557729361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209739303.

The product of its digits is 2743372800, while the sum is 79.

The spelling of 268891557729361 in words is "two hundred sixty-eight trillion, eight hundred ninety-one billion, five hundred fifty-seven million, seven hundred twenty-nine thousand, three hundred sixty-one".