82581972611 has 8 divisors (see below), whose sum is σ = 82949106240. Its totient is φ = 82214948032.

The previous prime is 82581972607. The next prime is 82581972617. The reversal of 82581972611 is 11627918528.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82581972611 - 2² = 82581972607 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82581972611.

It is not an unprimeable number, because it can be changed into a prime (82581972617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1744886 + ... + 1791588.

It is an arithmetic number, because the mean of its divisors is an integer number (10368638280).

Almost surely, 2^82581972611 is an apocalyptic number.

82581972611 is a deficient number, since it is larger than the sum of its proper divisors (367133629).

82581972611 is a wasteful number, since it uses less digits than its factorization.

82581972611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54525.

The product of its digits is 483840, while the sum is 50.

The spelling of 82581972611 in words is "eighty-two billion, five hundred eighty-one million, nine hundred seventy-two thousand, six hundred eleven".