11728145185555 has 16 divisors (see below), whose sum is σ = 14168765807424. Its totient is φ = 9319340113920.

The previous prime is 11728145185531. The next prime is 11728145185567. The reversal of 11728145185555 is 55558154182711.

It is a happy number.

It is not a de Polignac number, because 11728145185555 - 2³¹ = 11725997701907 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 11728145185555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8861559 + ... + 10098688.

It is an arithmetic number, because the mean of its divisors is an integer number (885547862964).

Almost surely, 2^{11728145185555} is an apocalyptic number.

11728145185555 is a deficient number, since it is larger than the sum of its proper divisors (2440620621869).

11728145185555 is a wasteful number, since it uses less digits than its factorization.

11728145185555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18961086.

The product of its digits is 11200000, while the sum is 58.

The spelling of 11728145185555 in words is "eleven trillion, seven hundred twenty-eight billion, one hundred forty-five million, one hundred eighty-five thousand, five hundred fifty-five".