51705918287 has 8 divisors (see below), whose sum is σ = 54233236416. Its totient is φ = 49238066592.

The previous prime is 51705918281. The next prime is 51705918289. The reversal of 51705918287 is 78281950715.

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 51705918287 - 2¹² = 51705914191 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 (51705918281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14864828 + ... + 14868305.

It is an arithmetic number, because the mean of its divisors is an integer number (6779154552).

Almost surely, 2^51705918287 is an apocalyptic number.

51705918287 is a deficient number, since it is larger than the sum of its proper divisors (2527318129).

51705918287 is a wasteful number, since it uses less digits than its factorization.

51705918287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29733217.

The product of its (nonzero) digits is 1411200, while the sum is 53.

The spelling of 51705918287 in words is "fifty-one billion, seven hundred five million, nine hundred eighteen thousand, two hundred eighty-seven".