16556156161511 has 16 divisors (see below), whose sum is σ = 16956025641984. Its totient is φ = 16156964938464.

The previous prime is 16556156161469. The next prime is 16556156161513. The reversal of 16556156161511 is 11516165165561.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16556156161511 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 16556156161511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556156161513) 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, 503409110 + ... + 503441996.

It is an arithmetic number, because the mean of its divisors is an integer number (1059751602624).

Almost surely, 2^{16556156161511} is an apocalyptic number.

16556156161511 is a deficient number, since it is larger than the sum of its proper divisors (399869480473).

16556156161511 is a wasteful number, since it uses less digits than its factorization.

16556156161511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42830.

The product of its digits is 810000, while the sum is 50.

The spelling of 16556156161511 in words is "sixteen trillion, five hundred fifty-six billion, one hundred fifty-six million, one hundred sixty-one thousand, five hundred eleven".