67891135265 has 4 divisors (see below), whose sum is σ = 81469362324. Its totient is φ = 54312908208.

The previous prime is 67891135259. The next prime is 67891135297. The reversal of 67891135265 is 56253119876.

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 33284718481 + 34606416784 = 182441^2 + 186028^2 .

It is a cyclic number.

It is not a de Polignac number, because 67891135265 - 2¹⁸ = 67890873121 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, 6789113522 + ... + 6789113531.

It is an arithmetic number, because the mean of its divisors is an integer number (20367340581).

Almost surely, 2^67891135265 is an apocalyptic number.

It is an amenable number.

67891135265 is a deficient number, since it is larger than the sum of its proper divisors (13578227059).

67891135265 is a wasteful number, since it uses less digits than its factorization.

67891135265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13578227058.

The product of its digits is 2721600, while the sum is 53.

The spelling of 67891135265 in words is "sixty-seven billion, eight hundred ninety-one million, one hundred thirty-five thousand, two hundred sixty-five".