16547221069 has 4 divisors (see below), whose sum is σ = 16620116544. Its totient is φ = 16474325596.

The previous prime is 16547221027. The next prime is 16547221081. The reversal of 16547221069 is 96012274561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96012274561 = 7 ⋅13716039223.

It is a cyclic number.

It is not a de Polignac number, because 16547221069 - 2¹⁷ = 16547089997 is a prime.

It is a super-2 number, since 2×16547221069² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16547227069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36447397 + ... + 36447850.

It is an arithmetic number, because the mean of its divisors is an integer number (4155029136).

Almost surely, 2^16547221069 is an apocalyptic number.

It is an amenable number.

16547221069 is a deficient number, since it is larger than the sum of its proper divisors (72895475).

16547221069 is an equidigital number, since it uses as much as digits as its factorization.

16547221069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72895474.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 16547221069 in words is "sixteen billion, five hundred forty-seven million, two hundred twenty-one thousand, sixty-nine".