51718846859 has 4 divisors (see below), whose sum is σ = 52819247904. Its totient is φ = 50618445816.

The previous prime is 51718846843. The next prime is 51718846903. The reversal of 51718846859 is 95864881715.

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

It is a cyclic number.

It is not a de Polignac number, because 51718846859 - 2⁴ = 51718846843 is a prime.

It is a super-3 number, since 3×51718846859³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51718846759) 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 3 ways as a sum of consecutive naturals, for example, 550200452 + ... + 550200545.

It is an arithmetic number, because the mean of its divisors is an integer number (13204811976).

Almost surely, 2^51718846859 is an apocalyptic number.

51718846859 is a deficient number, since it is larger than the sum of its proper divisors (1100401045).

51718846859 is a wasteful number, since it uses less digits than its factorization.

51718846859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100401044.

The product of its digits is 19353600, while the sum is 62.

The spelling of 51718846859 in words is "fifty-one billion, seven hundred eighteen million, eight hundred forty-six thousand, eight hundred fifty-nine".