51555615166 has 16 divisors (see below), whose sum is σ = 85110319728. Its totient is φ = 23226985600.

The previous prime is 51555615103. The next prime is 51555615173. The reversal of 51555615166 is 66151655515.

It is a happy number.

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, 10366705 + ... + 10371676.

It is an arithmetic number, because the mean of its divisors is an integer number (5319394983).

Almost surely, 2^51555615166 is an apocalyptic number.

51555615166 is a deficient number, since it is larger than the sum of its proper divisors (33554704562).

51555615166 is a wasteful number, since it uses less digits than its factorization.

51555615166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20738507.

The product of its digits is 675000, while the sum is 46.

The spelling of 51555615166 in words is "fifty-one billion, five hundred fifty-five million, six hundred fifteen thousand, one hundred sixty-six".