82905805128 has 32 divisors (see below), whose sum is σ = 212319747360. Its totient is φ = 26961237120.

The previous prime is 82905805091. The next prime is 82905805219. The reversal of 82905805128 is 82150850928.

It is a super-2 number, since 2×82905805128² (a number of 23 digits) contains 22 as substring.

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, 42125950 + ... + 42127917.

It is an arithmetic number, because the mean of its divisors is an integer number (6634992105).

Almost surely, 2^82905805128 is an apocalyptic number.

It is an amenable number.

82905805128 is an abundant number, since it is smaller than the sum of its proper divisors (129413942232).

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

82905805128 is a wasteful number, since it uses less digits than its factorization.

82905805128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84253917 (or 84253913 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 48.

The spelling of 82905805128 in words is "eighty-two billion, nine hundred five million, eight hundred five thousand, one hundred twenty-eight".