82161611 has 16 divisors (see below), whose sum is σ = 97506240. Its totient is φ = 67737600.

The previous prime is 82161601. The next prime is 82161613. The reversal of 82161611 is 11616128.

It is a de Polignac number, because none of the positive numbers 2^k-82161611 is a prime.

It is a super-3 number, since 3×82161611³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82161613) 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 15 ways as a sum of consecutive naturals, for example, 67811 + ... + 69011.

It is an arithmetic number, because the mean of its divisors is an integer number (6094140).

Almost surely, 2^82161611 is an apocalyptic number.

82161611 is a deficient number, since it is larger than the sum of its proper divisors (15344629).

82161611 is a wasteful number, since it uses less digits than its factorization.

82161611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574.

The product of its digits is 576, while the sum is 26.

The square root of 82161611 is about 9064.3042204021. The cubic root of 82161611 is about 434.7333742854.

Adding to 82161611 its reverse (11616128), we get a palindrome (93777739).

The spelling of 82161611 in words is "eighty-two million, one hundred sixty-one thousand, six hundred eleven".