6442149169 has 3 divisors (see below), whose sum is σ = 6442229433. Its totient is φ = 6442068906.

The previous prime is 6442149163. The next prime is 6442149193. The reversal of 6442149169 is 9619412446.

The square root of 6442149169 is 80263.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 6442149169 - 2⁵ = 6442149137 is a prime.

It is a super-2 number, since 2×6442149169² = 83002571831294781122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442149163) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 40132 + ... + 120394.

It is an arithmetic number, because the mean of its divisors is an integer number (2147409811).

Almost surely, 2^6442149169 is an apocalyptic number.

6442149169 is the 80263-rd square number.

6442149169 is the 40132-nd centered octagonal number.

It is an amenable number.

6442149169 is a deficient number, since it is larger than the sum of its proper divisors (80264).

6442149169 is an frugal number, since it uses more digits than its factorization.

6442149169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160526 (or 80263 counting only the distinct ones).

The product of its digits is 373248, while the sum is 46.

The cubic root of 6442149169 is about 1860.7024333652.

The spelling of 6442149169 in words is "six billion, four hundred forty-two million, one hundred forty-nine thousand, one hundred sixty-nine".