11555204866511 has 8 divisors (see below), whose sum is σ = 11928095483904. Its totient is φ = 11182323128760.

The previous prime is 11555204866493. The next prime is 11555204866567. The reversal of 11555204866511 is 11566840255511.

11555204866511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11555204866511 - 2¹⁸ = 11555204604367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11555204866511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11555204866111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 476726 + ... + 4830908.

It is an arithmetic number, because the mean of its divisors is an integer number (1491011935488).

Almost surely, 2^{11555204866511} is an apocalyptic number.

11555204866511 is a deficient number, since it is larger than the sum of its proper divisors (372890617393).

11555204866511 is an equidigital number, since it uses as much as digits as its factorization.

11555204866511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4439821.

The product of its (nonzero) digits is 1440000, while the sum is 50.

The spelling of 11555204866511 in words is "eleven trillion, five hundred fifty-five billion, two hundred four million, eight hundred sixty-six thousand, five hundred eleven".