6835649781 has 8 divisors (see below), whose sum is σ = 9126469440. Its totient is φ = 4550964992.

The previous prime is 6835649759. The next prime is 6835649797. The reversal of 6835649781 is 1879465386.

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

It is a cyclic number.

It is not a de Polignac number, because 6835649781 - 2⁹ = 6835649269 is a prime.

It is a super-2 number, since 2×6835649781² = 93452215856970695922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6835649581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1531116 + ... + 1535573.

It is an arithmetic number, because the mean of its divisors is an integer number (1140808680).

Almost surely, 2^6835649781 is an apocalyptic number.

It is an amenable number.

6835649781 is a deficient number, since it is larger than the sum of its proper divisors (2290819659).

6835649781 is a wasteful number, since it uses less digits than its factorization.

6835649781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067435.

The product of its digits is 8709120, while the sum is 57.

The square root of 6835649781 is about 82677.9884914963. The cubic root of 6835649781 is about 1897.8414804783.

The spelling of 6835649781 in words is "six billion, eight hundred thirty-five million, six hundred forty-nine thousand, seven hundred eighty-one".