10818395891689 has 9 divisors (see below), whose sum is σ = 10830464007357. Its totient is φ = 10806341219244.

The previous prime is 10818395891659. The next prime is 10818395891731. The reversal of 10818395891689 is 98619859381801.

The square root of 10818395891689 is 3289133.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 10818395891689 - 2³⁵ = 10784036153321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10818395891659) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5154070362 + ... + 5154072460.

Almost surely, 2^{10818395891689} is an apocalyptic number.

10818395891689 is the 3289133-rd square number.

10818395891689 is the 1644567-th centered octagonal number.

It is an amenable number.

10818395891689 is a deficient number, since it is larger than the sum of its proper divisors (12068115668).

10818395891689 is an frugal number, since it uses more digits than its factorization.

10818395891689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7332 (or 3666 counting only the distinct ones).

The product of its (nonzero) digits is 268738560, while the sum is 76.

It can be divided in two parts, 10818395 and 891689, that added together give a square (11710084 = 3422²).

The spelling of 10818395891689 in words is "ten trillion, eight hundred eighteen billion, three hundred ninety-five million, eight hundred ninety-one thousand, six hundred eighty-nine".