6808952186909 has 8 divisors (see below), whose sum is σ = 7052001279960. Its totient is φ = 6566453603136.

The previous prime is 6808952186903. The next prime is 6808952186947. The reversal of 6808952186909 is 9096812598086.

It can be written as a sum of positive squares in 4 ways, for example, as 274906219225 + 6534045967684 = 524315^2 + 2556178^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6808952186909 is a prime.

It is a super-2 number, since 2×6808952186909² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6808952186903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137602142 + ... + 137651615.

It is an arithmetic number, because the mean of its divisors is an integer number (881500159995).

Almost surely, 2^{6808952186909} is an apocalyptic number.

It is an amenable number.

6808952186909 is a deficient number, since it is larger than the sum of its proper divisors (243049093051).

6808952186909 is a wasteful number, since it uses less digits than its factorization.

6808952186909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275254639.

The product of its (nonzero) digits is 134369280, while the sum is 71.

The spelling of 6808952186909 in words is "six trillion, eight hundred eight billion, nine hundred fifty-two million, one hundred eighty-six thousand, nine hundred nine".