811683438108 has 12 divisors (see below), whose sum is σ = 1893928022280. Its totient is φ = 270561146032.

The previous prime is 811683438101. The next prime is 811683438109. The reversal of 811683438108 is 801834386118.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811683438101) 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, 33820143243 + ... + 33820143266.

It is an arithmetic number, because the mean of its divisors is an integer number (157827335190).

Almost surely, 2^811683438108 is an apocalyptic number.

It is an amenable number.

811683438108 is an abundant number, since it is smaller than the sum of its proper divisors (1082244584172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

811683438108 is a wasteful number, since it uses less digits than its factorization.

811683438108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67640286516 (or 67640286514 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 51.

The spelling of 811683438108 in words is "eight hundred eleven billion, six hundred eighty-three million, four hundred thirty-eight thousand, one hundred eight".