50851808855 has 4 divisors (see below), whose sum is σ = 61022170632. Its totient is φ = 40681447080.

The previous prime is 50851808809. The next prime is 50851808863. The reversal of 50851808855 is 55880815805.

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

It is a de Polignac number, because none of the positive numbers 2^k-50851808855 is a prime.

It is a super-2 number, since 2×50851808855² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50851808797 and 50851808806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5085180881 + ... + 5085180890.

It is an arithmetic number, because the mean of its divisors is an integer number (15255542658).

Almost surely, 2^50851808855 is an apocalyptic number.

50851808855 is a deficient number, since it is larger than the sum of its proper divisors (10170361777).

50851808855 is a wasteful number, since it uses less digits than its factorization.

50851808855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170361776.

The product of its (nonzero) digits is 2560000, while the sum is 53.

The spelling of 50851808855 in words is "fifty billion, eight hundred fifty-one million, eight hundred eight thousand, eight hundred fifty-five".