82121940582 has 64 divisors (see below), whose sum is σ = 183981957120. Its totient is φ = 24226020000.

The previous prime is 82121940577. The next prime is 82121940617. The reversal of 82121940582 is 28504912128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298707 + ... + 503457.

It is an arithmetic number, because the mean of its divisors is an integer number (2874718080).

Almost surely, 2^82121940582 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82121940582, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91990978560).

82121940582 is an abundant number, since it is smaller than the sum of its proper divisors (101860016538).

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

82121940582 is a wasteful number, since it uses less digits than its factorization.

82121940582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204929.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 82121940582 in words is "eighty-two billion, one hundred twenty-one million, nine hundred forty thousand, five hundred eighty-two".