51505551166 has 16 divisors (see below), whose sum is σ = 77435616384. Its totient is φ = 25693711384.

The previous prime is 51505551157. The next prime is 51505551191. The reversal of 51505551166 is 66115550515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4665345 + ... + 4676371.

It is an arithmetic number, because the mean of its divisors is an integer number (4839726024).

Almost surely, 2^51505551166 is an apocalyptic number.

51505551166 is a deficient number, since it is larger than the sum of its proper divisors (25930065218).

51505551166 is a wasteful number, since it uses less digits than its factorization.

51505551166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16175.

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 51505551166 in words is "fifty-one billion, five hundred five million, five hundred fifty-one thousand, one hundred sixty-six".