82111688 has 8 divisors (see below), whose sum is σ = 153959430. Its totient is φ = 41055840.

The previous prime is 82111669. The next prime is 82111697. The reversal of 82111688 is 88611128.

It can be written as a sum of positive squares in only one way, i.e., 74615044 + 7496644 = 8638^2 + 2738^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5131973 + ... + 5131988.

Almost surely, 2^82111688 is an apocalyptic number.

It is an amenable number.

82111688 is a deficient number, since it is larger than the sum of its proper divisors (71847742).

82111688 is a wasteful number, since it uses less digits than its factorization.

82111688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10263967 (or 10263963 counting only the distinct ones).

The product of its digits is 6144, while the sum is 35.

The square root of 82111688 is about 9061.5499777908. The cubic root of 82111688 is about 434.6453056151.

The spelling of 82111688 in words is "eighty-two million, one hundred eleven thousand, six hundred eighty-eight".