65111166505500 has 48 divisors (see below), whose sum is σ = 189603716868384. Its totient is φ = 17362977734400.

The previous prime is 65111166505477. The next prime is 65111166505519. The reversal of 65111166505500 is 550566111156.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21703720669 + ... + 21703723668.

It is an arithmetic number, because the mean of its divisors is an integer number (3950077434758).

Almost surely, 2^{65111166505500} is an apocalyptic number.

65111166505500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65111166505500 is an abundant number, since it is smaller than the sum of its proper divisors (124492550362884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65111166505500 is a wasteful number, since it uses less digits than its factorization.

65111166505500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43407444359 (or 43407444347 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 65111166505500 in words is "sixty-five trillion, one hundred eleven billion, one hundred sixty-six million, five hundred five thousand, five hundred".