83856815908 has 24 divisors (see below), whose sum is σ = 148205185632. Its totient is φ = 41513265024.

The previous prime is 83856815899. The next prime is 83856815927. The reversal of 83856815908 is 80951865838.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330091 + ... + 525997.

It is an arithmetic number, because the mean of its divisors is an integer number (6175216068).

Almost surely, 2^83856815908 is an apocalyptic number.

It is an amenable number.

83856815908 is a deficient number, since it is larger than the sum of its proper divisors (64348369724).

83856815908 is a wasteful number, since it uses less digits than its factorization.

83856815908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196971 (or 196969 counting only the distinct ones).

The product of its (nonzero) digits is 16588800, while the sum is 61.

The spelling of 83856815908 in words is "eighty-three billion, eight hundred fifty-six million, eight hundred fifteen thousand, nine hundred eight".