6813807842 has 8 divisors (see below), whose sum is σ = 10821930156. Its totient is φ = 3206497792.

The previous prime is 6813807841. The next prime is 6813807857. The reversal of 6813807842 is 2487083186.

It can be written as a sum of positive squares in 2 ways, for example, as 6806085001 + 7722841 = 82499^2 + 2779^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6813807841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100203023 + ... + 100203090.

Almost surely, 2^6813807842 is an apocalyptic number.

6813807842 is a deficient number, since it is larger than the sum of its proper divisors (4008122314).

6813807842 is a wasteful number, since it uses less digits than its factorization.

6813807842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200406132.

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 6813807842 is about 82545.7923942826. The cubic root of 6813807842 is about 1895.8179338859.

The spelling of 6813807842 in words is "six billion, eight hundred thirteen million, eight hundred seven thousand, eight hundred forty-two".