6799156849 has 3 divisors (see below), whose sum is σ = 6799239307. Its totient is φ = 6799074392.

The previous prime is 6799156841. The next prime is 6799156853. The reversal of 6799156849 is 9486519976.

The square root of 6799156849 is 82457.

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., 2673407025 + 4125749824 = 51705^2 + 64232^2 .

It is not a de Polignac number, because 6799156849 - 2³ = 6799156841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6799156841) 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, 41229 + ... + 123685.

Almost surely, 2^6799156849 is an apocalyptic number.

6799156849 is the 82457-th square number.

6799156849 is the 41229-th centered octagonal number.

It is an amenable number.

6799156849 is a deficient number, since it is larger than the sum of its proper divisors (82458).

6799156849 is an frugal number, since it uses more digits than its factorization.

6799156849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164914 (or 82457 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 64.

The cubic root of 6799156849 is about 1894.4581681783.

Multiplying 6799156849 by its sum of digits (64), we get a square (435146038336 = 659656²).

The spelling of 6799156849 in words is "six billion, seven hundred ninety-nine million, one hundred fifty-six thousand, eight hundred forty-nine".