11698814644609 has 9 divisors (see below), whose sum is σ = 12229655958849. Its totient is φ = 11190095281860.

The previous prime is 11698814644547. The next prime is 11698814644619. The reversal of 11698814644609 is 90644641889611.

The square root of 11698814644609 is 3420353.

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

11698814644609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-11698814644609 is a prime.

It is a super-3 number, since 3×11698814644609³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11698814644619) 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, 78593764 + ... + 78742474.

Almost surely, 2^{11698814644609} is an apocalyptic number.

11698814644609 is the 3420353-rd square number.

11698814644609 is the 1710177-th centered octagonal number.

It is an amenable number.

11698814644609 is a deficient number, since it is larger than the sum of its proper divisors (530841314240).

11698814644609 is an frugal number, since it uses more digits than its factorization.

11698814644609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297468 (or 148734 counting only the distinct ones).

The product of its (nonzero) digits is 71663616, while the sum is 67.

The spelling of 11698814644609 in words is "eleven trillion, six hundred ninety-eight billion, eight hundred fourteen million, six hundred forty-four thousand, six hundred nine".