82139133256 has 16 divisors (see below), whose sum is σ = 155960380800. Its totient is φ = 40549698384.

The previous prime is 82139133253. The next prime is 82139133281. The reversal of 82139133256 is 65233193128.

It is not an unprimeable number, because it can be changed into a prime (82139133253) 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, 64982860 + ... + 64984123.

It is an arithmetic number, because the mean of its divisors is an integer number (9747523800).

Almost surely, 2^82139133256 is an apocalyptic number.

It is an amenable number.

82139133256 is a deficient number, since it is larger than the sum of its proper divisors (73821247544).

82139133256 is a wasteful number, since it uses less digits than its factorization.

82139133256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129967068 (or 129967064 counting only the distinct ones).

The product of its digits is 233280, while the sum is 43.

The spelling of 82139133256 in words is "eighty-two billion, one hundred thirty-nine million, one hundred thirty-three thousand, two hundred fifty-six".