16556156154245 has 16 divisors (see below), whose sum is σ = 21036454168320. Its totient is φ = 12465576470784.

The previous prime is 16556156154221. The next prime is 16556156154247. The reversal of 16556156154245 is 54245165165561.

It is a cyclic number.

It is not a de Polignac number, because 16556156154245 - 2⁴⁰ = 15456644526469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556156154247) 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, 2760776 + ... + 6382334.

It is an arithmetic number, because the mean of its divisors is an integer number (1314778385520).

Almost surely, 2^{16556156154245} is an apocalyptic number.

It is an amenable number.

16556156154245 is a deficient number, since it is larger than the sum of its proper divisors (4480298014075).

16556156154245 is a wasteful number, since it uses less digits than its factorization.

16556156154245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3675364.

The product of its digits is 21600000, while the sum is 56.

The spelling of 16556156154245 in words is "sixteen trillion, five hundred fifty-six billion, one hundred fifty-six million, one hundred fifty-four thousand, two hundred forty-five".