16556435416231 has 8 divisors (see below), whose sum is σ = 17447332718304. Its totient is φ = 15679792471200.

The previous prime is 16556435416219. The next prime is 16556435416267. The reversal of 16556435416231 is 13261453465561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16556435416231 - 2²⁵ = 16556401861799 is a prime.

It is a super-2 number, since 2×16556435416231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556435416331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3563586876 + ... + 3563591521.

It is an arithmetic number, because the mean of its divisors is an integer number (2180916589788).

Almost surely, 2^{16556435416231} is an apocalyptic number.

16556435416231 is a deficient number, since it is larger than the sum of its proper divisors (890897302073).

16556435416231 is a wasteful number, since it uses less digits than its factorization.

16556435416231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7127178521.

The product of its digits is 7776000, while the sum is 52.

The spelling of 16556435416231 in words is "sixteen trillion, five hundred fifty-six billion, four hundred thirty-five million, four hundred sixteen thousand, two hundred thirty-one".