51565065011 has 8 divisors (see below), whose sum is σ = 51648710400. Its totient is φ = 51481474120.

The previous prime is 51565064963. The next prime is 51565065043. The reversal of 51565065011 is 11056056515.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51565065011 - 2²² = 51560870707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51565065061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151866 + ... + 2175696.

It is an arithmetic number, because the mean of its divisors is an integer number (6456088800).

Almost surely, 2^51565065011 is an apocalyptic number.

51565065011 is a deficient number, since it is larger than the sum of its proper divisors (83645389).

51565065011 is a wasteful number, since it uses less digits than its factorization.

51565065011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27249.

The product of its (nonzero) digits is 22500, while the sum is 35.

The spelling of 51565065011 in words is "fifty-one billion, five hundred sixty-five million, sixty-five thousand, eleven".