16545717667551 has 8 divisors (see below), whose sum is σ = 22061003402160. Its totient is φ = 11030455188992.

The previous prime is 16545717667547. The next prime is 16545717667601. The reversal of 16545717667551 is 15576671754561.

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 16545717667551 - 2² = 16545717667547 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545717667351) 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, 4080066 + ... + 7052543.

It is an arithmetic number, because the mean of its divisors is an integer number (2757625425270).

Almost surely, 2^{16545717667551} is an apocalyptic number.

16545717667551 is a deficient number, since it is larger than the sum of its proper divisors (5515285734609).

16545717667551 is a wasteful number, since it uses less digits than its factorization.

16545717667551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11628025.

The product of its digits is 185220000, while the sum is 66.

The spelling of 16545717667551 in words is "sixteen trillion, five hundred forty-five billion, seven hundred seventeen million, six hundred sixty-seven thousand, five hundred fifty-one".