268887697985 has 4 divisors (see below), whose sum is σ = 322665237588. Its totient is φ = 215110158384.

The previous prime is 268887697963. The next prime is 268887698003. The reversal of 268887697985 is 589796788862.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 202542302209 + 66345395776 = 450047^2 + 257576^2 .

It is a cyclic number.

It is not a de Polignac number, because 268887697985 - 2¹⁶ = 268887632449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26888769794 + ... + 26888769803.

It is an arithmetic number, because the mean of its divisors is an integer number (80666309397).

Almost surely, 2^268887697985 is an apocalyptic number.

It is an amenable number.

268887697985 is a deficient number, since it is larger than the sum of its proper divisors (53777539603).

268887697985 is an equidigital number, since it uses as much as digits as its factorization.

268887697985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53777539602.

The product of its digits is 5852528640, while the sum is 83.

The spelling of 268887697985 in words is "two hundred sixty-eight billion, eight hundred eighty-seven million, six hundred ninety-seven thousand, nine hundred eighty-five".