6820000149169 has 3 divisors (see below), whose sum is σ = 6820002760683. Its totient is φ = 6819997537656.

The previous prime is 6820000149167. The next prime is 6820000149211. The reversal of 6820000149169 is 9619410000286.

It is a happy number.

The square root of 6820000149169 is 2611513.

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 can be written as a sum of positive squares in only one way, i.e., 790578831025 + 6029421318144 = 889145^2 + 2455488^2 .

It is not a de Polignac number, because 6820000149169 - 2¹ = 6820000149167 is a prime.

It is a super-2 number, since 2×6820000149169² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6820000149163) 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, 1305757 + ... + 3917269.

It is an arithmetic number, because the mean of its divisors is an integer number (2273334253561).

Almost surely, 2^{6820000149169} is an apocalyptic number.

6820000149169 is the 2611513-rd square number.

6820000149169 is the 1305757-th centered octagonal number.

It is an amenable number.

6820000149169 is a deficient number, since it is larger than the sum of its proper divisors (2611514).

6820000149169 is an frugal number, since it uses more digits than its factorization.

6820000149169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223026 (or 2611513 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 6820000149169 in words is "six trillion, eight hundred twenty billion, one hundred forty-nine thousand, one hundred sixty-nine".