16551572071 has 8 divisors (see below), whose sum is σ = 16730935200. Its totient is φ = 16373171232.

The previous prime is 16551572069. The next prime is 16551572077. The reversal of 16551572071 is 17027515561.

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 16551572071 - 2¹ = 16551572069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16551572077) 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, 205960 + ... + 274813.

It is an arithmetic number, because the mean of its divisors is an integer number (2091366900).

Almost surely, 2^16551572071 is an apocalyptic number.

16551572071 is a deficient number, since it is larger than the sum of its proper divisors (179363129).

16551572071 is a wasteful number, since it uses less digits than its factorization.

16551572071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481145.

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 16551572071 in words is "sixteen billion, five hundred fifty-one million, five hundred seventy-two thousand, seventy-one".