11556506016155 has 16 divisors (see below), whose sum is σ = 14632365712800. Its totient is φ = 8737810744320.

The previous prime is 11556506016151. The next prime is 11556506016173. The reversal of 11556506016155 is 55161060565511.

It is not a de Polignac number, because 11556506016155 - 2² = 11556506016151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11556506016151) 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, 144434390 + ... + 144514379.

It is an arithmetic number, because the mean of its divisors is an integer number (914522857050).

Almost surely, 2^{11556506016155} is an apocalyptic number.

11556506016155 is a deficient number, since it is larger than the sum of its proper divisors (3075859696645).

11556506016155 is a wasteful number, since it uses less digits than its factorization.

11556506016155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288949214.

The product of its (nonzero) digits is 675000, while the sum is 47.

The spelling of 11556506016155 in words is "eleven trillion, five hundred fifty-six billion, five hundred six million, sixteen thousand, one hundred fifty-five".