6826551309 has 12 divisors (see below), whose sum is σ = 10200594300. Its totient is φ = 4394101824.

The previous prime is 6826551307. The next prime is 6826551313. The reversal of 6826551309 is 9031556286.

6826551309 is a `hidden beast` number, since 68 + 2 + 6 + 551 + 30 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3721610025 + 3104941284 = 61005^2 + 55722^2 .

It is not a de Polignac number, because 6826551309 - 2¹ = 6826551307 is a prime.

It is a super-2 number, since 2×6826551309² = 93203605548819226962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6826551307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13077424 + ... + 13077945.

It is an arithmetic number, because the mean of its divisors is an integer number (850049525).

Almost surely, 2^6826551309 is an apocalyptic number.

It is an amenable number.

6826551309 is a deficient number, since it is larger than the sum of its proper divisors (3374042991).

6826551309 is a wasteful number, since it uses less digits than its factorization.

6826551309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26155404 (or 26155401 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 6826551309 is about 82622.9466250145. The cubic root of 6826551309 is about 1896.9990770503. Note that the first 3 decimals are identical.

The spelling of 6826551309 in words is "six billion, eight hundred twenty-six million, five hundred fifty-one thousand, three hundred nine".