6721112169 has 24 divisors (see below), whose sum is σ = 9864838880. Its totient is φ = 4408639488.

The previous prime is 6721112137. The next prime is 6721112173. The reversal of 6721112169 is 9612111276.

It is not a de Polignac number, because 6721112169 - 2⁵ = 6721112137 is a prime.

It is a super-2 number, since 2×6721112169² = 90346697576559769122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6721112369) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 540777 + ... + 553065.

Almost surely, 2^6721112169 is an apocalyptic number.

It is an amenable number.

6721112169 is a deficient number, since it is larger than the sum of its proper divisors (3143726711).

6721112169 is a wasteful number, since it uses less digits than its factorization.

6721112169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13269 (or 13266 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 6721112169 is about 81982.3893833304. The cubic root of 6721112169 is about 1887.1816910069.

The spelling of 6721112169 in words is "six billion, seven hundred twenty-one million, one hundred twelve thousand, one hundred sixty-nine".