6819864351169 has 3 divisors (see below), whose sum is σ = 6819866962657. Its totient is φ = 6819861739682.

The previous prime is 6819864351109. The next prime is 6819864351203. The reversal of 6819864351169 is 9611534689186.

The square root of 6819864351169 is 2611487.

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 6819864351169 - 2²¹ = 6819862254017 is a prime.

It is a super-2 number, since 2×6819864351169² (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 (6819864351109) 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, 1305744 + ... + 3917230.

Almost surely, 2^{6819864351169} is an apocalyptic number.

6819864351169 is the 2611487-th square number.

6819864351169 is the 1305744-th centered octagonal number.

It is an amenable number.

6819864351169 is a deficient number, since it is larger than the sum of its proper divisors (2611488).

6819864351169 is an frugal number, since it uses more digits than its factorization.

6819864351169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5222974 (or 2611487 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 67.

The spelling of 6819864351169 in words is "six trillion, eight hundred nineteen billion, eight hundred sixty-four million, three hundred fifty-one thousand, one hundred sixty-nine".