51565040365771 has 8 divisors (see below), whose sum is σ = 53362521658080. Its totient is φ = 49768850836992.

The previous prime is 51565040365703. The next prime is 51565040365901. The reversal of 51565040365771 is 17756304056515.

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 51565040365771 - 2¹¹ = 51565040363723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51565040365171) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 322859655 + ... + 323019328.

It is an arithmetic number, because the mean of its divisors is an integer number (6670315207260).

Almost surely, 2^{51565040365771} is an apocalyptic number.

51565040365771 is a deficient number, since it is larger than the sum of its proper divisors (1797481292309).

51565040365771 is a wasteful number, since it uses less digits than its factorization.

51565040365771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645881765.

The product of its (nonzero) digits is 13230000, while the sum is 55.

The spelling of 51565040365771 in words is "fifty-one trillion, five hundred sixty-five billion, forty million, three hundred sixty-five thousand, seven hundred seventy-one".