82581215108 has 48 divisors (see below), whose sum is σ = 168029178240. Its totient is φ = 34778128896.

The previous prime is 82581215081. The next prime is 82581215111. The reversal of 82581215108 is 80151218528.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4810316 + ... + 4827452.

It is an arithmetic number, because the mean of its divisors is an integer number (3500607880).

Almost surely, 2^82581215108 is an apocalyptic number.

It is an amenable number.

82581215108 is an abundant number, since it is smaller than the sum of its proper divisors (85447963132).

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

82581215108 is a wasteful number, since it uses less digits than its factorization.

82581215108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20124 (or 20122 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 41.

The spelling of 82581215108 in words is "eighty-two billion, five hundred eighty-one million, two hundred fifteen thousand, one hundred eight".