81834706408 has 48 divisors (see below), whose sum is σ = 189886978080. Its totient is φ = 32374165824.

The previous prime is 81834706367. The next prime is 81834706411. The reversal of 81834706408 is 80460743818.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4314010 + ... + 4332937.

It is an arithmetic number, because the mean of its divisors is an integer number (3955978710).

Almost surely, 2^81834706408 is an apocalyptic number.

It is an amenable number.

81834706408 is an abundant number, since it is smaller than the sum of its proper divisors (108052271672).

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

81834706408 is a wasteful number, since it uses less digits than its factorization.

81834706408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8646986 (or 8646969 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 81834706408 in words is "eighty-one billion, eight hundred thirty-four million, seven hundred six thousand, four hundred eight".