16556346543 has 16 divisors (see below), whose sum is σ = 24086687616. Its totient is φ = 10032179040.

The previous prime is 16556346503. The next prime is 16556346581. The reversal of 16556346543 is 34564365561.

It is not a de Polignac number, because 16556346543 - 2⁹ = 16556346031 is a prime.

It is a super-2 number, since 2×16556346543² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16556346492 and 16556346501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556346503) 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, 131205 + ... + 224337.

It is an arithmetic number, because the mean of its divisors is an integer number (1505417976).

Almost surely, 2^16556346543 is an apocalyptic number.

16556346543 is a deficient number, since it is larger than the sum of its proper divisors (7530341073).

16556346543 is a wasteful number, since it uses less digits than its factorization.

16556346543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98534.

The product of its digits is 3888000, while the sum is 48.

The spelling of 16556346543 in words is "sixteen billion, five hundred fifty-six million, three hundred forty-six thousand, five hundred forty-three".