16554401272551 has 16 divisors (see below), whose sum is σ = 22148316353024. Its totient is φ = 10998437433984.

The previous prime is 16554401272543. The next prime is 16554401272571. The reversal of 16554401272551 is 15527210445561.

It is not a de Polignac number, because 16554401272551 - 2³ = 16554401272543 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 16554401272551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16554401272571) 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, 6478786 + ... + 8665071.

It is an arithmetic number, because the mean of its divisors is an integer number (1384269772064).

Almost surely, 2^{16554401272551} is an apocalyptic number.

16554401272551 is a deficient number, since it is larger than the sum of its proper divisors (5593915080473).

16554401272551 is a wasteful number, since it uses less digits than its factorization.

16554401272551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15145110.

The product of its (nonzero) digits is 1680000, while the sum is 48.

The spelling of 16554401272551 in words is "sixteen trillion, five hundred fifty-four billion, four hundred one million, two hundred seventy-two thousand, five hundred fifty-one".