3111145665 has 32 divisors (see below), whose sum is σ = 5154779520. Its totient is φ = 1600413696.

The previous prime is 3111145621. The next prime is 3111145679. The reversal of 3111145665 is 5665411113.

It is not a de Polignac number, because 3111145665 - 2⁶ = 3111145601 is a prime.

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 in 31 ways as a sum of consecutive naturals, for example, 498454 + ... + 504656.

It is an arithmetic number, because the mean of its divisors is an integer number (161086860).

Almost surely, 2^3111145665 is an apocalyptic number.

It is an amenable number.

3111145665 is a deficient number, since it is larger than the sum of its proper divisors (2043633855).

3111145665 is a wasteful number, since it uses less digits than its factorization.

3111145665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7393.

The product of its digits is 10800, while the sum is 33.

The square root of 3111145665 is about 55777.6448498859. The cubic root of 3111145665 is about 1459.8451178980.

Adding to 3111145665 its reverse (5665411113), we get a palindrome (8776556778).

The spelling of 3111145665 in words is "three billion, one hundred eleven million, one hundred forty-five thousand, six hundred sixty-five".