2921135611689 has 9 divisors (see below), whose sum is σ = 4219425512029. Its totient is φ = 1947420322860.

The previous prime is 2921135611679. The next prime is 2921135611711. The reversal of 2921135611689 is 9861165311292.

The square root of 2921135611689 is 1709133.

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

2921135611689 is a `hidden beast` number, since 2 + 9 + 2 + 1 + 13 + 5 + 611 + 6 + 8 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 2921135611689 - 2¹¹ = 2921135609641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2921135611609) 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, 4842544 + ... + 5412254.

Almost surely, 2^{2921135611689} is an apocalyptic number.

2921135611689 is the 1709133-rd square number.

2921135611689 is the 854567-th centered octagonal number.

It is an amenable number.

2921135611689 is a deficient number, since it is larger than the sum of its proper divisors (1298289900340).

2921135611689 is an frugal number, since it uses more digits than its factorization.

2921135611689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139428 (or 569714 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

It can be divided in two parts, 29211 and 35611689, that added together give a square (35640900 = 5970²).

The spelling of 2921135611689 in words is "two trillion, nine hundred twenty-one billion, one hundred thirty-five million, six hundred eleven thousand, six hundred eighty-nine".