6835215681 has 24 divisors (see below), whose sum is σ = 11290930560. Its totient is φ = 3903276096.

The previous prime is 6835215661. The next prime is 6835215701. The reversal of 6835215681 is 1865125386.

6835215681 is a `hidden beast` number, since 6 + 83 + 5 + 2 + 1 + 568 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (6835215661) and next prime (6835215701).

It is not a de Polignac number, because 6835215681 - 2²⁹ = 6298344769 is a prime.

It is a super-2 number, since 2×6835215681² = 93440346811576587522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6835215661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63421 + ... + 133013.

It is an arithmetic number, because the mean of its divisors is an integer number (470455440).

Almost surely, 2^6835215681 is an apocalyptic number.

It is an amenable number.

6835215681 is a deficient number, since it is larger than the sum of its proper divisors (4455714879).

6835215681 is a wasteful number, since it uses less digits than its factorization.

6835215681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71165 (or 71162 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 6835215681 is about 82675.3632045242. The cubic root of 6835215681 is about 1897.8013052960.

The spelling of 6835215681 in words is "six billion, eight hundred thirty-five million, two hundred fifteen thousand, six hundred eighty-one".