65556485191 has 4 divisors (see below), whose sum is σ = 65556997384. Its totient is φ = 65555973000.

The previous prime is 65556485173. The next prime is 65556485207. The reversal of 65556485191 is 19158465556.

65556485191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65556485191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65556485591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120016 + ... + 381466.

It is an arithmetic number, because the mean of its divisors is an integer number (16389249346).

Almost surely, 2^65556485191 is an apocalyptic number.

65556485191 is a deficient number, since it is larger than the sum of its proper divisors (512193).

65556485191 is a wasteful number, since it uses less digits than its factorization.

65556485191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512192.

The product of its digits is 6480000, while the sum is 55.

The spelling of 65556485191 in words is "sixty-five billion, five hundred fifty-six million, four hundred eighty-five thousand, one hundred ninety-one".