16556155665011 has 16 divisors (see below), whose sum is σ = 17370895024896. Its totient is φ = 15758973360000.

The previous prime is 16556155664981. The next prime is 16556155665089. The reversal of 16556155665011 is 11056655165561.

It is a cyclic number.

It is not a de Polignac number, because 16556155665011 - 2²² = 16556151470707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16556155665211) 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, 78069941 + ... + 78281721.

It is an arithmetic number, because the mean of its divisors is an integer number (1085680939056).

Almost surely, 2^{16556155665011} is an apocalyptic number.

16556155665011 is a deficient number, since it is larger than the sum of its proper divisors (814739359885).

16556155665011 is a wasteful number, since it uses less digits than its factorization.

16556155665011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253214.

The product of its (nonzero) digits is 4050000, while the sum is 53.

The spelling of 16556155665011 in words is "sixteen trillion, five hundred fifty-six billion, one hundred fifty-five million, six hundred sixty-five thousand, eleven".