51167198566 has 8 divisors (see below), whose sum is σ = 83728143144. Its totient is φ = 23257817520.

The previous prime is 51167198539. The next prime is 51167198581. The reversal of 51167198566 is 66589176115.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1162890855 + ... + 1162890898.

It is an arithmetic number, because the mean of its divisors is an integer number (10466017893).

Almost surely, 2^51167198566 is an apocalyptic number.

51167198566 is a deficient number, since it is larger than the sum of its proper divisors (32560944578).

51167198566 is a wasteful number, since it uses less digits than its factorization.

51167198566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325781766.

The product of its digits is 2721600, while the sum is 55.

The spelling of 51167198566 in words is "fifty-one billion, one hundred sixty-seven million, one hundred ninety-eight thousand, five hundred sixty-six".