16554423265661 has 16 divisors (see below), whose sum is σ = 17101487800320. Its totient is φ = 16008178022640.

The previous prime is 16554423265649. The next prime is 16554423265663. The reversal of 16554423265661 is 16656232445561.

It is not a de Polignac number, because 16554423265661 - 2¹⁰ = 16554423264637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16554423265597 and 16554423265606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16554423265663) 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, 314463380 + ... + 314516018.

It is an arithmetic number, because the mean of its divisors is an integer number (1068842987520).

Almost surely, 2^{16554423265661} is an apocalyptic number.

It is an amenable number.

16554423265661 is a deficient number, since it is larger than the sum of its proper divisors (547064534659).

16554423265661 is a wasteful number, since it uses less digits than its factorization.

16554423265661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60224.

The product of its digits is 31104000, while the sum is 56.

The spelling of 16554423265661 in words is "sixteen trillion, five hundred fifty-four billion, four hundred twenty-three million, two hundred sixty-five thousand, six hundred sixty-one".