1131656665623 has 16 divisors (see below), whose sum is σ = 1646111776896. Its totient is φ = 685825142240.

The previous prime is 1131656665621. The next prime is 1131656665639. The reversal of 1131656665623 is 3265666561311.

It is a cyclic number.

It is not a de Polignac number, because 1131656665623 - 2¹ = 1131656665621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131656665621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170461 + ... + 1514057.

It is an arithmetic number, because the mean of its divisors is an integer number (102881986056).

Almost surely, 2^{1131656665623} is an apocalyptic number.

1131656665623 is a deficient number, since it is larger than the sum of its proper divisors (514455111273).

1131656665623 is a wasteful number, since it uses less digits than its factorization.

1131656665623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369134.

The product of its digits is 3499200, while the sum is 51.

The spelling of 1131656665623 in words is "one trillion, one hundred thirty-one billion, six hundred fifty-six million, six hundred sixty-five thousand, six hundred twenty-three".