11551666653205 has 16 divisors (see below), whose sum is σ = 16165597651200. Its totient is φ = 7921142846736.

The previous prime is 11551666653199. The next prime is 11551666653251. The reversal of 11551666653205 is 50235666615511.

It is not a de Polignac number, because 11551666653205 - 2²⁹ = 11551129782293 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3367831129 + ... + 3367834558.

It is an arithmetic number, because the mean of its divisors is an integer number (1010349853200).

Almost surely, 2^{11551666653205} is an apocalyptic number.

It is an amenable number.

11551666653205 is a deficient number, since it is larger than the sum of its proper divisors (4613930997995).

11551666653205 is an frugal number, since it uses more digits than its factorization.

11551666653205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735665713 (or 6735665699 counting only the distinct ones).

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 11551666653205 in words is "eleven trillion, five hundred fifty-one billion, six hundred sixty-six million, six hundred fifty-three thousand, two hundred five".