111665728082 has 4 divisors (see below), whose sum is σ = 167498592126. Its totient is φ = 55832864040.

The previous prime is 111665728073. The next prime is 111665728123. The reversal of 111665728082 is 280827566111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 280827566111 = 541 ⋅519089771.

It can be written as a sum of positive squares in only one way, i.e., 109521945481 + 2143782601 = 330941^2 + 46301^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27916432019 + ... + 27916432022.

Almost surely, 2^111665728082 is an apocalyptic number.

111665728082 is a deficient number, since it is larger than the sum of its proper divisors (55832864044).

111665728082 is an equidigital number, since it uses as much as digits as its factorization.

111665728082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55832864043.

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 111665728082 in words is "one hundred eleven billion, six hundred sixty-five million, seven hundred twenty-eight thousand, eighty-two".