11554165540321 has 16 divisors (see below), whose sum is σ = 11893965061888. Its totient is φ = 11215822464000.

The previous prime is 11554165540289. The next prime is 11554165540399. The reversal of 11554165540321 is 12304556145511.

It is a cyclic number.

It is not a de Polignac number, because 11554165540321 - 2⁵ = 11554165540289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11554165540921) 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, 114573121 + ... + 114673921.

It is an arithmetic number, because the mean of its divisors is an integer number (743372816368).

Almost surely, 2^{11554165540321} is an apocalyptic number.

It is an amenable number.

11554165540321 is a deficient number, since it is larger than the sum of its proper divisors (339799521567).

11554165540321 is a wasteful number, since it uses less digits than its factorization.

11554165540321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107992.

The product of its (nonzero) digits is 360000, while the sum is 43.

The spelling of 11554165540321 in words is "eleven trillion, five hundred fifty-four billion, one hundred sixty-five million, five hundred forty thousand, three hundred twenty-one".