611420866559 has 4 divisors (see below), whose sum is σ = 647386799904. Its totient is φ = 575454933216.

The previous prime is 611420866513. The next prime is 611420866613. The reversal of 611420866559 is 955668024116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611420866559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 611420866559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611420866759) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 17982966647 + ... + 17982966680.

It is an arithmetic number, because the mean of its divisors is an integer number (161846699976).

Almost surely, 2^611420866559 is an apocalyptic number.

611420866559 is a deficient number, since it is larger than the sum of its proper divisors (35965933345).

611420866559 is a wasteful number, since it uses less digits than its factorization.

611420866559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35965933344.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 611420866559 in words is "six hundred eleven billion, four hundred twenty million, eight hundred sixty-six thousand, five hundred fifty-nine".