51840917855 has 8 divisors (see below), whose sum is σ = 62210368752. Its totient is φ = 41471889408.

The previous prime is 51840917833. The next prime is 51840917861. The reversal of 51840917855 is 55871904815.

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 51840917855 - 2¹⁶ = 51840852319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51840917797 and 51840917806.

It is a congruent number.

It is an unprimeable number.

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, 321119 + ... + 454751.

It is an arithmetic number, because the mean of its divisors is an integer number (7776296094).

Almost surely, 2^51840917855 is an apocalyptic number.

51840917855 is a deficient number, since it is larger than the sum of its proper divisors (10369450897).

51840917855 is a wasteful number, since it uses less digits than its factorization.

51840917855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211225.

The product of its (nonzero) digits is 2016000, while the sum is 53.

The spelling of 51840917855 in words is "fifty-one billion, eight hundred forty million, nine hundred seventeen thousand, eight hundred fifty-five".